Ute Eppinger

AMSTERDAM – At the Radical Health Festival Helsinki this past June, Gerhard Hindricks, MD, PhD, was challenged by a young man when he dared to look into the crystal ball. “In the middle of my presentation, a maybe 25-year-old man stood up and said, ‘Dr. Hindricks, in 10 years, we will no longer need you!’ ” Dr. Hindricks noted at the great debate event “Will Artificial Intelligence Replace Cardiologists?” held at the annual congress of the European Society of Cardiology. He subsequently had an interesting discussion with the man. In his opinion, the future role of the physician is “an unavoidable discussion for cardiovascular medicine.”

Dr. Hindricks, from the University of Leipzig (Germany), considered artificial intelligence in cardiology to be “potentially the most important topic of the congress” and suggested that “we have to be more open to introducing new technologies into our practice. I sometimes have the impression that we are neither quick nor open enough to introducing new technologies, to leaving the old and to letting the new, better technology be effective in our patients.”
 

Asset or threat?

AI is dramatically changing the field and the role of the physician – but it is not making cardiologists superfluous. In this respect, Dr. Hindricks; Folkert Asselbergs, MD, PhD, professor of cardiology at the Amsterdam Heart Center; and Harriette Van Spall, MD, associate professor of medicine at McMaster University in Hamilton, Ont., were unanimous: They agreed, although they assess the opportunities and risks posed by AI differently.

Dr. Asselbergs saw AI as less of a threat and more of an asset. In his opinion, a cardiology-specific speech model could be used to the advantage of both patient and physician. A medical chatbot could offer patients information and suggested readings, and it could create the patient’s self-reported medical history and medical summaries for laypersons.

For physicians, a medical chatbot could be beneficial in the creation of patient reports, the selection of relevant literature, the creation of automated laboratory orders, the review of clinical discharge reports, for consultations, and for processing the consultations, as well as for complying with guidelines.

Dr. Asselbergs considered AI’s primary advantage to be the time that it saves, which can then be used “for complex interventions, palliative care, and acute treatment.”

The advantages of AI, he said, include the following:

• Efficiency and scale of AI in data analysis
• Automation
• AI does not get tired and is not biased
• Proactive health care provision and early intervention
• Reduction in health care costs
• Remains up to date with the latest knowledge.

He sees the following disadvantages:

• Lack of human contact, empathy, and the physician-patient relationship
• Ethical implications and challenges
• The potential for AI to make incorrect diagnoses or to be influenced by bias in the training data.

Medical supervision needed

For Dr. Van Spall, AI is primarily a tool. A generative AI could create useful materials such as images, videos, text, sound, 3D models, virtual environments, notes for clinical visits, medical summaries, and answers to clinical queries. But “the use of AI can lead to misinformation and expose the patient to risk, and there are no laws regulating liability.”

Dr. Van Spall stressed that AI could greatly increase efficiency. For example, in echocardiography, chamber volumes and function can be quantified automatically. ECGs can be interpreted automatically. “Even the workload associated with reading off of screens can be reduced, compared with unsupported reading.” However, she maintained that the use of AI requires medical supervision. “AI cannot function without cardiologists,” since it has “enormous limitations.” Dr. Van Spall does not see “any way to close the gaps that cardiologists may leave in terms of knowledge, service, and communication.”

According to the American College of Cardiology, 26% of the 32,000 cardiologists in the United States are older than 61 years. “That is a net loss of 546 cardiologists per year. We must use AI to support cardiologists, not to replace them,” said Dr. Van Spall.
 

Cardiologists becoming supervisors?

Dr. Asselbergs saw AI as a means of creating more equality. “Nearly everyone now has a smartphone. Let’s take ultrasound via AI as an example. There are rural areas that have no access to health care. If nurses or dietitians there create an ultrasound based on AI and send pictures for medical analysis, it will really help people.”

Dr. Hindricks hypothesized that machine learning and AI will make a huge difference in the field of rare diseases. Rare diseases are massively underdiagnosed simply because they are so rare and it requires a lot of experience to recognize them. “Digital elements can significantly support this,” said Dr. Hindricks.

For Dr. Van Spall, AI could make care and treatment safer. There will be more digital tools and virtual models available during training too. “I believe that the cardiologist will continue to occupy an important role, in terms of communication and processes. I do not see this role disappearing,” she said. Efficiency and precision are so important. “To make good decisions, we also want to get in touch with the person we trust.”

For Dr. Asselbergs, the role of cardiologists will change to one of a supervisor. “More joint decision-making, more discussion with our patients: I think this is the direction we’re heading in.”

This article was translated from the Medscape German Edition.

A version of this article first appeared on Medscape.com.

AMSTERDAM – At the Radical Health Festival Helsinki this past June, Gerhard Hindricks, MD, PhD, was challenged by a young man when he dared to look into the crystal ball. “In the middle of my presentation, a maybe 25-year-old man stood up and said, ‘Dr. Hindricks, in 10 years, we will no longer need you!’ ” Dr. Hindricks noted at the great debate event “Will Artificial Intelligence Replace Cardiologists?” held at the annual congress of the European Society of Cardiology. He subsequently had an interesting discussion with the man. In his opinion, the future role of the physician is “an unavoidable discussion for cardiovascular medicine.”

Dr. Hindricks, from the University of Leipzig (Germany), considered artificial intelligence in cardiology to be “potentially the most important topic of the congress” and suggested that “we have to be more open to introducing new technologies into our practice. I sometimes have the impression that we are neither quick nor open enough to introducing new technologies, to leaving the old and to letting the new, better technology be effective in our patients.”
 

Asset or threat?

AI is dramatically changing the field and the role of the physician – but it is not making cardiologists superfluous. In this respect, Dr. Hindricks; Folkert Asselbergs, MD, PhD, professor of cardiology at the Amsterdam Heart Center; and Harriette Van Spall, MD, associate professor of medicine at McMaster University in Hamilton, Ont., were unanimous: They agreed, although they assess the opportunities and risks posed by AI differently.

Dr. Asselbergs saw AI as less of a threat and more of an asset. In his opinion, a cardiology-specific speech model could be used to the advantage of both patient and physician. A medical chatbot could offer patients information and suggested readings, and it could create the patient’s self-reported medical history and medical summaries for laypersons.

For physicians, a medical chatbot could be beneficial in the creation of patient reports, the selection of relevant literature, the creation of automated laboratory orders, the review of clinical discharge reports, for consultations, and for processing the consultations, as well as for complying with guidelines.

Dr. Asselbergs considered AI’s primary advantage to be the time that it saves, which can then be used “for complex interventions, palliative care, and acute treatment.”

The advantages of AI, he said, include the following:

• Efficiency and scale of AI in data analysis
• Automation
• AI does not get tired and is not biased
• Proactive health care provision and early intervention
• Reduction in health care costs
• Remains up to date with the latest knowledge.

He sees the following disadvantages:

• Lack of human contact, empathy, and the physician-patient relationship
• Ethical implications and challenges
• The potential for AI to make incorrect diagnoses or to be influenced by bias in the training data.

Medical supervision needed

For Dr. Van Spall, AI is primarily a tool. A generative AI could create useful materials such as images, videos, text, sound, 3D models, virtual environments, notes for clinical visits, medical summaries, and answers to clinical queries. But “the use of AI can lead to misinformation and expose the patient to risk, and there are no laws regulating liability.”

Dr. Van Spall stressed that AI could greatly increase efficiency. For example, in echocardiography, chamber volumes and function can be quantified automatically. ECGs can be interpreted automatically. “Even the workload associated with reading off of screens can be reduced, compared with unsupported reading.” However, she maintained that the use of AI requires medical supervision. “AI cannot function without cardiologists,” since it has “enormous limitations.” Dr. Van Spall does not see “any way to close the gaps that cardiologists may leave in terms of knowledge, service, and communication.”

According to the American College of Cardiology, 26% of the 32,000 cardiologists in the United States are older than 61 years. “That is a net loss of 546 cardiologists per year. We must use AI to support cardiologists, not to replace them,” said Dr. Van Spall.
 

Cardiologists becoming supervisors?

Dr. Asselbergs saw AI as a means of creating more equality. “Nearly everyone now has a smartphone. Let’s take ultrasound via AI as an example. There are rural areas that have no access to health care. If nurses or dietitians there create an ultrasound based on AI and send pictures for medical analysis, it will really help people.”

Dr. Hindricks hypothesized that machine learning and AI will make a huge difference in the field of rare diseases. Rare diseases are massively underdiagnosed simply because they are so rare and it requires a lot of experience to recognize them. “Digital elements can significantly support this,” said Dr. Hindricks.

For Dr. Van Spall, AI could make care and treatment safer. There will be more digital tools and virtual models available during training too. “I believe that the cardiologist will continue to occupy an important role, in terms of communication and processes. I do not see this role disappearing,” she said. Efficiency and precision are so important. “To make good decisions, we also want to get in touch with the person we trust.”

For Dr. Asselbergs, the role of cardiologists will change to one of a supervisor. “More joint decision-making, more discussion with our patients: I think this is the direction we’re heading in.”

This article was translated from the Medscape German Edition.

A version of this article first appeared on Medscape.com.

AMSTERDAM – At the Radical Health Festival Helsinki this past June, Gerhard Hindricks, MD, PhD, was challenged by a young man when he dared to look into the crystal ball. “In the middle of my presentation, a maybe 25-year-old man stood up and said, ‘Dr. Hindricks, in 10 years, we will no longer need you!’ ” Dr. Hindricks noted at the great debate event “Will Artificial Intelligence Replace Cardiologists?” held at the annual congress of the European Society of Cardiology. He subsequently had an interesting discussion with the man. In his opinion, the future role of the physician is “an unavoidable discussion for cardiovascular medicine.”

Dr. Hindricks, from the University of Leipzig (Germany), considered artificial intelligence in cardiology to be “potentially the most important topic of the congress” and suggested that “we have to be more open to introducing new technologies into our practice. I sometimes have the impression that we are neither quick nor open enough to introducing new technologies, to leaving the old and to letting the new, better technology be effective in our patients.”
 

Asset or threat?

AI is dramatically changing the field and the role of the physician – but it is not making cardiologists superfluous. In this respect, Dr. Hindricks; Folkert Asselbergs, MD, PhD, professor of cardiology at the Amsterdam Heart Center; and Harriette Van Spall, MD, associate professor of medicine at McMaster University in Hamilton, Ont., were unanimous: They agreed, although they assess the opportunities and risks posed by AI differently.

Dr. Asselbergs saw AI as less of a threat and more of an asset. In his opinion, a cardiology-specific speech model could be used to the advantage of both patient and physician. A medical chatbot could offer patients information and suggested readings, and it could create the patient’s self-reported medical history and medical summaries for laypersons.

For physicians, a medical chatbot could be beneficial in the creation of patient reports, the selection of relevant literature, the creation of automated laboratory orders, the review of clinical discharge reports, for consultations, and for processing the consultations, as well as for complying with guidelines.

Dr. Asselbergs considered AI’s primary advantage to be the time that it saves, which can then be used “for complex interventions, palliative care, and acute treatment.”

The advantages of AI, he said, include the following:

• Efficiency and scale of AI in data analysis
• Automation
• AI does not get tired and is not biased
• Proactive health care provision and early intervention
• Reduction in health care costs
• Remains up to date with the latest knowledge.

He sees the following disadvantages:

• Lack of human contact, empathy, and the physician-patient relationship
• Ethical implications and challenges
• The potential for AI to make incorrect diagnoses or to be influenced by bias in the training data.

Medical supervision needed

For Dr. Van Spall, AI is primarily a tool. A generative AI could create useful materials such as images, videos, text, sound, 3D models, virtual environments, notes for clinical visits, medical summaries, and answers to clinical queries. But “the use of AI can lead to misinformation and expose the patient to risk, and there are no laws regulating liability.”

Dr. Van Spall stressed that AI could greatly increase efficiency. For example, in echocardiography, chamber volumes and function can be quantified automatically. ECGs can be interpreted automatically. “Even the workload associated with reading off of screens can be reduced, compared with unsupported reading.” However, she maintained that the use of AI requires medical supervision. “AI cannot function without cardiologists,” since it has “enormous limitations.” Dr. Van Spall does not see “any way to close the gaps that cardiologists may leave in terms of knowledge, service, and communication.”

According to the American College of Cardiology, 26% of the 32,000 cardiologists in the United States are older than 61 years. “That is a net loss of 546 cardiologists per year. We must use AI to support cardiologists, not to replace them,” said Dr. Van Spall.
 

Cardiologists becoming supervisors?

Dr. Asselbergs saw AI as a means of creating more equality. “Nearly everyone now has a smartphone. Let’s take ultrasound via AI as an example. There are rural areas that have no access to health care. If nurses or dietitians there create an ultrasound based on AI and send pictures for medical analysis, it will really help people.”

Dr. Hindricks hypothesized that machine learning and AI will make a huge difference in the field of rare diseases. Rare diseases are massively underdiagnosed simply because they are so rare and it requires a lot of experience to recognize them. “Digital elements can significantly support this,” said Dr. Hindricks.

For Dr. Van Spall, AI could make care and treatment safer. There will be more digital tools and virtual models available during training too. “I believe that the cardiologist will continue to occupy an important role, in terms of communication and processes. I do not see this role disappearing,” she said. Efficiency and precision are so important. “To make good decisions, we also want to get in touch with the person we trust.”

For Dr. Asselbergs, the role of cardiologists will change to one of a supervisor. “More joint decision-making, more discussion with our patients: I think this is the direction we’re heading in.”

This article was translated from the Medscape German Edition.

A version of this article first appeared on Medscape.com.

IgG4 fights viruses and bacteria. However, sometimes it targets the body itself. “This then leads to inflammation, the healing of which the body is unable to keep under control,” explained Ulf Müller-Ladner, MD, PhD, chairperson of the German Society of Internal Medicine.

At the DGIM annual press conference, Dr. Müller-Ladner, who is also director of the department of rheumatology and clinical immunology at the Kerckhoff Clinic in Bad Nauheim, Germany, explained how IgG4 inflammation is triggered throughout the body and what therapeutic options are available.
 

Many manifestations

IgG4-associated inflammation can affect one or more organs or the surrounding connective tissue and cause fibrosis. As a result of fibrosis, the organ gradually loses function and is eventually transformed completely into scarred connective tissue.

“In the case of IgG4-associated inflammation, these fibroses have a histological structure, but extracting a sample is not possible from every affected organ,” said Dr. Müller-Ladner. Liver, bile ducts, blood vessels, skin, eyes, or even the central nervous system – practically every organ system can be affected by these inflammatory reactions.

IgG4-associated diseases have likely been around for some time, but it is only in the past 10 years that awareness has grown that, despite various manifestations, “they are all one and the same disease,” said Dr. Müller-Ladner.

IgG4-associated chronic, inflammatory, fibrosing diseases were only classified together as a single entity in the past few years. In terms of pathophysiology, B lymphocytes, IgG4-positive plasma cells, follicular T-helper cells, cytotoxic CD4-positive T cells, and macrophages work together and trigger an inflammatory reaction, which then encourages fibroblasts to overproduce connective tissue.
 

Beware inexplicable inflammation

It is estimated that 1 in 100,000 people suffer from the disease, but the number of incorrectly categorized patients may be significantly higher.

The diagnostic challenge lies in the fact that IgG4-associated inflammation occurs in almost every organ. It can cause different symptoms, depending on the organ affected.

Dr. Müller-Ladner provided the following take-home message: “Every inexplicable inflammation event and every organ dysfunction, especially if associated with an increase in connective tissue, could be an IgG4-associated disease. Keeping this in mind is the key to recovery.”

With most people, the inflammation persists for many years before any symptoms of the disease develop. Highly acute courses of progression are also possible.

Classic symptoms, such as fever, are not so characteristic of the latent inflammatory reaction, and according to classification criteria published by specialist rheumatology societies, they are an exclusion criterion. This is true with respect to the differential diagnosis for vasculitis, which also occurs throughout the body.
 

Histology is key

Blood levels of IgG4 and imaging are not always enough to confirm the diagnosis. In such cases, the histology is often a crucial factor in making a definitive diagnosis. Dominant organs in IgG4-associated diseases are the pancreas, the liver, the gallbladder, the intestines, the retroperitoneum, large blood vessels, the kidneys, the heart, the brain, saliva, tear ducts, as well all of the body’s connective tissue.

The kidneys play host to inflammation in the connective tissue and space-occupying masses in particular. “If the pancreas is affected, the signs can vary from diffuse swelling to the onset of diabetes mellitus. In contrast, if the aorta is affected, then the inflammation is characterized through a thickening of the vessel walls, aneurysms, and the corresponding circulation disorders,” said Dr. Müller-Ladner.

Because of the long period before the diagnosis is made, more than 50% of patients exhibit irreversible organ damage at the time of diagnosis, he added.
 

Glucocorticoids and immunosuppressants

Despite therapeutic intervention, the disease can have a fatal outcome, even if the patient is young, said Dr. Müller-Ladner. Glucocorticoids are the current therapy of choice. The dose is more than 0.5 mg of prednisolone equivalent per kg of body weight. “This usually leads to a rapid improvement in the inflammation. Subsequently, every organ is thoroughly diagnosed to assess the severity of the disease and to plan further treatment steps.”

In the long term, proven immunosuppressants, such as azathioprine, mycophenolate, leflunomide, and methotrexate, can be used, just as for many other chronic inflammatory diseases. Cyclophosphamide or cyclosporine is used more rarely, owing to their side effect profiles.

Because of the B-cell dominance, B-cell–depleting therapy with rituximab is currently a highly effective therapeutic option but one that must be applied for, because such use is off label. “If the body responds well to the medication, organ function often recovers,” said Dr. Müller-Ladner.

This article was translated from the Medscape German edition. A version appeared on Medscape.com.

IgG4 fights viruses and bacteria. However, sometimes it targets the body itself. “This then leads to inflammation, the healing of which the body is unable to keep under control,” explained Ulf Müller-Ladner, MD, PhD, chairperson of the German Society of Internal Medicine.

At the DGIM annual press conference, Dr. Müller-Ladner, who is also director of the department of rheumatology and clinical immunology at the Kerckhoff Clinic in Bad Nauheim, Germany, explained how IgG4 inflammation is triggered throughout the body and what therapeutic options are available.
 

Many manifestations

IgG4-associated inflammation can affect one or more organs or the surrounding connective tissue and cause fibrosis. As a result of fibrosis, the organ gradually loses function and is eventually transformed completely into scarred connective tissue.

“In the case of IgG4-associated inflammation, these fibroses have a histological structure, but extracting a sample is not possible from every affected organ,” said Dr. Müller-Ladner. Liver, bile ducts, blood vessels, skin, eyes, or even the central nervous system – practically every organ system can be affected by these inflammatory reactions.

IgG4-associated diseases have likely been around for some time, but it is only in the past 10 years that awareness has grown that, despite various manifestations, “they are all one and the same disease,” said Dr. Müller-Ladner.

IgG4-associated chronic, inflammatory, fibrosing diseases were only classified together as a single entity in the past few years. In terms of pathophysiology, B lymphocytes, IgG4-positive plasma cells, follicular T-helper cells, cytotoxic CD4-positive T cells, and macrophages work together and trigger an inflammatory reaction, which then encourages fibroblasts to overproduce connective tissue.
 

Beware inexplicable inflammation

It is estimated that 1 in 100,000 people suffer from the disease, but the number of incorrectly categorized patients may be significantly higher.

The diagnostic challenge lies in the fact that IgG4-associated inflammation occurs in almost every organ. It can cause different symptoms, depending on the organ affected.

Dr. Müller-Ladner provided the following take-home message: “Every inexplicable inflammation event and every organ dysfunction, especially if associated with an increase in connective tissue, could be an IgG4-associated disease. Keeping this in mind is the key to recovery.”

With most people, the inflammation persists for many years before any symptoms of the disease develop. Highly acute courses of progression are also possible.

Classic symptoms, such as fever, are not so characteristic of the latent inflammatory reaction, and according to classification criteria published by specialist rheumatology societies, they are an exclusion criterion. This is true with respect to the differential diagnosis for vasculitis, which also occurs throughout the body.
 

Histology is key

Blood levels of IgG4 and imaging are not always enough to confirm the diagnosis. In such cases, the histology is often a crucial factor in making a definitive diagnosis. Dominant organs in IgG4-associated diseases are the pancreas, the liver, the gallbladder, the intestines, the retroperitoneum, large blood vessels, the kidneys, the heart, the brain, saliva, tear ducts, as well all of the body’s connective tissue.

The kidneys play host to inflammation in the connective tissue and space-occupying masses in particular. “If the pancreas is affected, the signs can vary from diffuse swelling to the onset of diabetes mellitus. In contrast, if the aorta is affected, then the inflammation is characterized through a thickening of the vessel walls, aneurysms, and the corresponding circulation disorders,” said Dr. Müller-Ladner.

Because of the long period before the diagnosis is made, more than 50% of patients exhibit irreversible organ damage at the time of diagnosis, he added.
 

Glucocorticoids and immunosuppressants

Despite therapeutic intervention, the disease can have a fatal outcome, even if the patient is young, said Dr. Müller-Ladner. Glucocorticoids are the current therapy of choice. The dose is more than 0.5 mg of prednisolone equivalent per kg of body weight. “This usually leads to a rapid improvement in the inflammation. Subsequently, every organ is thoroughly diagnosed to assess the severity of the disease and to plan further treatment steps.”

In the long term, proven immunosuppressants, such as azathioprine, mycophenolate, leflunomide, and methotrexate, can be used, just as for many other chronic inflammatory diseases. Cyclophosphamide or cyclosporine is used more rarely, owing to their side effect profiles.

Because of the B-cell dominance, B-cell–depleting therapy with rituximab is currently a highly effective therapeutic option but one that must be applied for, because such use is off label. “If the body responds well to the medication, organ function often recovers,” said Dr. Müller-Ladner.

This article was translated from the Medscape German edition. A version appeared on Medscape.com.

IgG4 fights viruses and bacteria. However, sometimes it targets the body itself. “This then leads to inflammation, the healing of which the body is unable to keep under control,” explained Ulf Müller-Ladner, MD, PhD, chairperson of the German Society of Internal Medicine.

At the DGIM annual press conference, Dr. Müller-Ladner, who is also director of the department of rheumatology and clinical immunology at the Kerckhoff Clinic in Bad Nauheim, Germany, explained how IgG4 inflammation is triggered throughout the body and what therapeutic options are available.
 

Many manifestations

IgG4-associated inflammation can affect one or more organs or the surrounding connective tissue and cause fibrosis. As a result of fibrosis, the organ gradually loses function and is eventually transformed completely into scarred connective tissue.

“In the case of IgG4-associated inflammation, these fibroses have a histological structure, but extracting a sample is not possible from every affected organ,” said Dr. Müller-Ladner. Liver, bile ducts, blood vessels, skin, eyes, or even the central nervous system – practically every organ system can be affected by these inflammatory reactions.

IgG4-associated diseases have likely been around for some time, but it is only in the past 10 years that awareness has grown that, despite various manifestations, “they are all one and the same disease,” said Dr. Müller-Ladner.

IgG4-associated chronic, inflammatory, fibrosing diseases were only classified together as a single entity in the past few years. In terms of pathophysiology, B lymphocytes, IgG4-positive plasma cells, follicular T-helper cells, cytotoxic CD4-positive T cells, and macrophages work together and trigger an inflammatory reaction, which then encourages fibroblasts to overproduce connective tissue.
 

Beware inexplicable inflammation

It is estimated that 1 in 100,000 people suffer from the disease, but the number of incorrectly categorized patients may be significantly higher.

The diagnostic challenge lies in the fact that IgG4-associated inflammation occurs in almost every organ. It can cause different symptoms, depending on the organ affected.

Dr. Müller-Ladner provided the following take-home message: “Every inexplicable inflammation event and every organ dysfunction, especially if associated with an increase in connective tissue, could be an IgG4-associated disease. Keeping this in mind is the key to recovery.”

With most people, the inflammation persists for many years before any symptoms of the disease develop. Highly acute courses of progression are also possible.

Classic symptoms, such as fever, are not so characteristic of the latent inflammatory reaction, and according to classification criteria published by specialist rheumatology societies, they are an exclusion criterion. This is true with respect to the differential diagnosis for vasculitis, which also occurs throughout the body.
 

Histology is key

Blood levels of IgG4 and imaging are not always enough to confirm the diagnosis. In such cases, the histology is often a crucial factor in making a definitive diagnosis. Dominant organs in IgG4-associated diseases are the pancreas, the liver, the gallbladder, the intestines, the retroperitoneum, large blood vessels, the kidneys, the heart, the brain, saliva, tear ducts, as well all of the body’s connective tissue.

The kidneys play host to inflammation in the connective tissue and space-occupying masses in particular. “If the pancreas is affected, the signs can vary from diffuse swelling to the onset of diabetes mellitus. In contrast, if the aorta is affected, then the inflammation is characterized through a thickening of the vessel walls, aneurysms, and the corresponding circulation disorders,” said Dr. Müller-Ladner.

Because of the long period before the diagnosis is made, more than 50% of patients exhibit irreversible organ damage at the time of diagnosis, he added.
 

Glucocorticoids and immunosuppressants

Despite therapeutic intervention, the disease can have a fatal outcome, even if the patient is young, said Dr. Müller-Ladner. Glucocorticoids are the current therapy of choice. The dose is more than 0.5 mg of prednisolone equivalent per kg of body weight. “This usually leads to a rapid improvement in the inflammation. Subsequently, every organ is thoroughly diagnosed to assess the severity of the disease and to plan further treatment steps.”

In the long term, proven immunosuppressants, such as azathioprine, mycophenolate, leflunomide, and methotrexate, can be used, just as for many other chronic inflammatory diseases. Cyclophosphamide or cyclosporine is used more rarely, owing to their side effect profiles.

Because of the B-cell dominance, B-cell–depleting therapy with rituximab is currently a highly effective therapeutic option but one that must be applied for, because such use is off label. “If the body responds well to the medication, organ function often recovers,” said Dr. Müller-Ladner.

This article was translated from the Medscape German edition. A version appeared on Medscape.com.

An investigational vaccine against respiratory syncytial virus (RSV) in pregnant women has been shown to help protect infants against severe disease, according to the vaccine’s manufacturer.

Pfizer recently announced that in the course of a randomized, double-blind, placebo-controlled phase 3 study, the vaccine RSVpreF had an almost 82% efficacy against severe RSV infection in infants from birth through the first 90 days of life, according to a company press release.

The vaccine also had a 69% efficacy against severe disease through the first 6 months of life. A total of 7,400 women had received a single dose of 120 mcg RSVpreF in the late second or third trimester of their pregnancy. There were no signs of safety issues for the mothers or infants.

Due to the good results, the enrollment in the study was halted on the recommendation of the study’s Data Monitoring Committee after achieving a primary endpoint. The company plans to apply for marketing authorization to the U.S. Food and Drug Administration by the end of 2022 and to other regulatory agencies in 2023.

“The directness of the strategy, to vaccinate expectant mothers during pregnancy so that their newborn is then later protected, is new and a very interesting approach,” commented Prof. Ortwin Adams, MD, head of virologic diagnostics at the Institute for Virology of the University Hospital of Düsseldorf (Germany) to the Science Media Centre (SMC).

In terms of the RSV vaccination strategy presented, “the unborn child has taken center stage from the outset.” Because the vaccination route is the placental transfer of antibodies from mother to child (“passive immunity”), “... the medical points of contact for this vaccination will be the gynecologists, not the pediatricians,” Dr. Adams said.

“This concept imitates the natural process, since the mother normally passes immune defenses she acquired through infections to the child via the umbilical cord and her breast milk before and after birth. This procedure is long-proven and practiced worldwide, especially in nonindustrialized countries, for a variety of diseases, including tetanus, whooping cough (pertussis), and viral flu (influenza),” explained Markus Rose, MD, PhD, head of Pediatric Pulmonology at the Olgahospital, Stuttgart, Germany.

The development of an RSV vaccine had ground to a halt for many decades: A tragedy in the 1960s set the whole field of research back. Using the model of the first polio vaccine, scientists had manufactured an experimental vaccine with inactivated viruses. However, tests showed that the vaccine did not protect the children vaccinated, but it actually infected them with RSV, they then fell ill, and two children died. Today, potential RSV vaccines are first tested on adults and not on children.
 

Few treatment options

RSV causes seasonal epidemics, can lead to bronchiolitis and pneumonia in infants, and is one of the main causes of hospital stays in young children. Monoclonal antibodies are currently the only preventive option, since there is still no vaccine. Usually, 60%-70% of infants and nearly all children younger than 2 years are infected with RSV, but the virus can also trigger pneumonia in adults.

“RSV infections constitute a major public health challenge: It is the most dangerous respiratory virus for young infants, it is also a threat to the chronically ill and immunocompromised of all ages, and [it] is the second most common cause of death worldwide (after malaria) in young children,” stated Dr. Rose.

Recently, pandemic-related measures (face masks, more intense disinfection) meant that the “normal” RSV infections in healthy adults, which usually progress like a mild cold, were prevented, and mothers were unable to pass on as much RSV immune defense to their children. “This was presumably responsible in part for the massive wave of RSV infections in fall and winter of 2021/22,” explained Dr. Rose.

Thomas Mertens, MD, PhD, chair of the Standing Committee on Vaccination at the Robert Koch Institute (STIKO) and former director of the Institute for Virology at Ulm University Hospital, Germany, also noted: “It would be an important and potentially achievable goal to significantly reduce the incidence rate of hospitalizations. In this respect, RSV poses a significant problem for young children, their parents, and the burden on pediatric clinics.”
 

Final evaluation pending

“I am definitely finding the data interesting, but the original data are needed,” Dr. Mertens said. Once the data are published at a conference or published in a peer-reviewed journal, physicians will be able to better judge the data for themselves, he said.

Dr. Rose characterized the new vaccine as “novel,” including in terms of its composition. Earlier RSV vaccines used the so-called postfusion F protein as their starting point. But it has become known in the meantime that the key to immunogenicity is the continued prefusion state of the apical epitope: Prefusion F-specific memory B cells in adults naturally infected with RSV produce potent neutralizing antibodies.

The new vaccine is bivalent and protects against both RSV A and RSV B.

To date, RSV vaccination directly in young infants have had only had a weak efficacy and were sometimes poorly tolerated. The vaccine presented here is expected to be tested in young adults first, then in school children, then young children.

Through successful vaccination of the entire population, the transfer of RS viruses to young children could be prevented. “To what extent this, or any other RSV vaccine still to be developed on the same basis, will also be effective and well tolerated in young infants is still difficult to assess,” said Dr. Rose.

Dr. Mertens emphasized that all of the study data now needs to be seen as quickly as possible: “This is also a general requirement for transparency from the pharmaceutical companies, which is also rightly criticized.”

This article was originally published in Medscape’s German edition and a version appeared on Medscape.com.

An investigational vaccine against respiratory syncytial virus (RSV) in pregnant women has been shown to help protect infants against severe disease, according to the vaccine’s manufacturer.

Pfizer recently announced that in the course of a randomized, double-blind, placebo-controlled phase 3 study, the vaccine RSVpreF had an almost 82% efficacy against severe RSV infection in infants from birth through the first 90 days of life, according to a company press release.

The vaccine also had a 69% efficacy against severe disease through the first 6 months of life. A total of 7,400 women had received a single dose of 120 mcg RSVpreF in the late second or third trimester of their pregnancy. There were no signs of safety issues for the mothers or infants.

Due to the good results, the enrollment in the study was halted on the recommendation of the study’s Data Monitoring Committee after achieving a primary endpoint. The company plans to apply for marketing authorization to the U.S. Food and Drug Administration by the end of 2022 and to other regulatory agencies in 2023.

“The directness of the strategy, to vaccinate expectant mothers during pregnancy so that their newborn is then later protected, is new and a very interesting approach,” commented Prof. Ortwin Adams, MD, head of virologic diagnostics at the Institute for Virology of the University Hospital of Düsseldorf (Germany) to the Science Media Centre (SMC).

In terms of the RSV vaccination strategy presented, “the unborn child has taken center stage from the outset.” Because the vaccination route is the placental transfer of antibodies from mother to child (“passive immunity”), “... the medical points of contact for this vaccination will be the gynecologists, not the pediatricians,” Dr. Adams said.

“This concept imitates the natural process, since the mother normally passes immune defenses she acquired through infections to the child via the umbilical cord and her breast milk before and after birth. This procedure is long-proven and practiced worldwide, especially in nonindustrialized countries, for a variety of diseases, including tetanus, whooping cough (pertussis), and viral flu (influenza),” explained Markus Rose, MD, PhD, head of Pediatric Pulmonology at the Olgahospital, Stuttgart, Germany.

The development of an RSV vaccine had ground to a halt for many decades: A tragedy in the 1960s set the whole field of research back. Using the model of the first polio vaccine, scientists had manufactured an experimental vaccine with inactivated viruses. However, tests showed that the vaccine did not protect the children vaccinated, but it actually infected them with RSV, they then fell ill, and two children died. Today, potential RSV vaccines are first tested on adults and not on children.
 

Few treatment options

RSV causes seasonal epidemics, can lead to bronchiolitis and pneumonia in infants, and is one of the main causes of hospital stays in young children. Monoclonal antibodies are currently the only preventive option, since there is still no vaccine. Usually, 60%-70% of infants and nearly all children younger than 2 years are infected with RSV, but the virus can also trigger pneumonia in adults.

“RSV infections constitute a major public health challenge: It is the most dangerous respiratory virus for young infants, it is also a threat to the chronically ill and immunocompromised of all ages, and [it] is the second most common cause of death worldwide (after malaria) in young children,” stated Dr. Rose.

Recently, pandemic-related measures (face masks, more intense disinfection) meant that the “normal” RSV infections in healthy adults, which usually progress like a mild cold, were prevented, and mothers were unable to pass on as much RSV immune defense to their children. “This was presumably responsible in part for the massive wave of RSV infections in fall and winter of 2021/22,” explained Dr. Rose.

Thomas Mertens, MD, PhD, chair of the Standing Committee on Vaccination at the Robert Koch Institute (STIKO) and former director of the Institute for Virology at Ulm University Hospital, Germany, also noted: “It would be an important and potentially achievable goal to significantly reduce the incidence rate of hospitalizations. In this respect, RSV poses a significant problem for young children, their parents, and the burden on pediatric clinics.”
 

Final evaluation pending

“I am definitely finding the data interesting, but the original data are needed,” Dr. Mertens said. Once the data are published at a conference or published in a peer-reviewed journal, physicians will be able to better judge the data for themselves, he said.

Dr. Rose characterized the new vaccine as “novel,” including in terms of its composition. Earlier RSV vaccines used the so-called postfusion F protein as their starting point. But it has become known in the meantime that the key to immunogenicity is the continued prefusion state of the apical epitope: Prefusion F-specific memory B cells in adults naturally infected with RSV produce potent neutralizing antibodies.

The new vaccine is bivalent and protects against both RSV A and RSV B.

To date, RSV vaccination directly in young infants have had only had a weak efficacy and were sometimes poorly tolerated. The vaccine presented here is expected to be tested in young adults first, then in school children, then young children.

Through successful vaccination of the entire population, the transfer of RS viruses to young children could be prevented. “To what extent this, or any other RSV vaccine still to be developed on the same basis, will also be effective and well tolerated in young infants is still difficult to assess,” said Dr. Rose.

Dr. Mertens emphasized that all of the study data now needs to be seen as quickly as possible: “This is also a general requirement for transparency from the pharmaceutical companies, which is also rightly criticized.”

This article was originally published in Medscape’s German edition and a version appeared on Medscape.com.

An investigational vaccine against respiratory syncytial virus (RSV) in pregnant women has been shown to help protect infants against severe disease, according to the vaccine’s manufacturer.

Pfizer recently announced that in the course of a randomized, double-blind, placebo-controlled phase 3 study, the vaccine RSVpreF had an almost 82% efficacy against severe RSV infection in infants from birth through the first 90 days of life, according to a company press release.

The vaccine also had a 69% efficacy against severe disease through the first 6 months of life. A total of 7,400 women had received a single dose of 120 mcg RSVpreF in the late second or third trimester of their pregnancy. There were no signs of safety issues for the mothers or infants.

Due to the good results, the enrollment in the study was halted on the recommendation of the study’s Data Monitoring Committee after achieving a primary endpoint. The company plans to apply for marketing authorization to the U.S. Food and Drug Administration by the end of 2022 and to other regulatory agencies in 2023.

“The directness of the strategy, to vaccinate expectant mothers during pregnancy so that their newborn is then later protected, is new and a very interesting approach,” commented Prof. Ortwin Adams, MD, head of virologic diagnostics at the Institute for Virology of the University Hospital of Düsseldorf (Germany) to the Science Media Centre (SMC).

In terms of the RSV vaccination strategy presented, “the unborn child has taken center stage from the outset.” Because the vaccination route is the placental transfer of antibodies from mother to child (“passive immunity”), “... the medical points of contact for this vaccination will be the gynecologists, not the pediatricians,” Dr. Adams said.

“This concept imitates the natural process, since the mother normally passes immune defenses she acquired through infections to the child via the umbilical cord and her breast milk before and after birth. This procedure is long-proven and practiced worldwide, especially in nonindustrialized countries, for a variety of diseases, including tetanus, whooping cough (pertussis), and viral flu (influenza),” explained Markus Rose, MD, PhD, head of Pediatric Pulmonology at the Olgahospital, Stuttgart, Germany.

The development of an RSV vaccine had ground to a halt for many decades: A tragedy in the 1960s set the whole field of research back. Using the model of the first polio vaccine, scientists had manufactured an experimental vaccine with inactivated viruses. However, tests showed that the vaccine did not protect the children vaccinated, but it actually infected them with RSV, they then fell ill, and two children died. Today, potential RSV vaccines are first tested on adults and not on children.
 

Few treatment options

RSV causes seasonal epidemics, can lead to bronchiolitis and pneumonia in infants, and is one of the main causes of hospital stays in young children. Monoclonal antibodies are currently the only preventive option, since there is still no vaccine. Usually, 60%-70% of infants and nearly all children younger than 2 years are infected with RSV, but the virus can also trigger pneumonia in adults.

“RSV infections constitute a major public health challenge: It is the most dangerous respiratory virus for young infants, it is also a threat to the chronically ill and immunocompromised of all ages, and [it] is the second most common cause of death worldwide (after malaria) in young children,” stated Dr. Rose.

Recently, pandemic-related measures (face masks, more intense disinfection) meant that the “normal” RSV infections in healthy adults, which usually progress like a mild cold, were prevented, and mothers were unable to pass on as much RSV immune defense to their children. “This was presumably responsible in part for the massive wave of RSV infections in fall and winter of 2021/22,” explained Dr. Rose.

Thomas Mertens, MD, PhD, chair of the Standing Committee on Vaccination at the Robert Koch Institute (STIKO) and former director of the Institute for Virology at Ulm University Hospital, Germany, also noted: “It would be an important and potentially achievable goal to significantly reduce the incidence rate of hospitalizations. In this respect, RSV poses a significant problem for young children, their parents, and the burden on pediatric clinics.”
 

Final evaluation pending

“I am definitely finding the data interesting, but the original data are needed,” Dr. Mertens said. Once the data are published at a conference or published in a peer-reviewed journal, physicians will be able to better judge the data for themselves, he said.

Dr. Rose characterized the new vaccine as “novel,” including in terms of its composition. Earlier RSV vaccines used the so-called postfusion F protein as their starting point. But it has become known in the meantime that the key to immunogenicity is the continued prefusion state of the apical epitope: Prefusion F-specific memory B cells in adults naturally infected with RSV produce potent neutralizing antibodies.

The new vaccine is bivalent and protects against both RSV A and RSV B.

To date, RSV vaccination directly in young infants have had only had a weak efficacy and were sometimes poorly tolerated. The vaccine presented here is expected to be tested in young adults first, then in school children, then young children.

Through successful vaccination of the entire population, the transfer of RS viruses to young children could be prevented. “To what extent this, or any other RSV vaccine still to be developed on the same basis, will also be effective and well tolerated in young infants is still difficult to assess,” said Dr. Rose.

Dr. Mertens emphasized that all of the study data now needs to be seen as quickly as possible: “This is also a general requirement for transparency from the pharmaceutical companies, which is also rightly criticized.”

This article was originally published in Medscape’s German edition and a version appeared on Medscape.com.

Every year, around 7,000 people in Germany develop a brain tumor, and around half of those cases involve a glioblastoma, a particularly aggressive form of the disease. Glioblastomas are incurable, but advances are being made in both diagnostics and therapy. Scientists from the Heidelberg University Hospital (UKHD) and from the German Cancer Research Center (DKFZ) in Heidelberg have discovered a fundamentally new way in which glioblastomas spread within the brain.

This news organization spoke to Wolfgang Wick, MD, medical director of the neurologic clinic at UKHD, about how glioblastomas are treated; the role that vaccinations, recombinant proteins, and parvoviruses play; and what therapeutic approaches might be derived from the discovery of this method by which glioblastomas spread.

Question: Glioblastomas spread through the brain like a fungal network. So how would a glioblastoma currently be treated? The tumor can only be partially removed through surgery.

Answer: Nevertheless, glioblastoma would be operated on. This would have a significant effect. Relieving the strain of the main tumor mass, without generating a new deficit, is prognostically very good for the patient concerned. However, surgery on glioblastoma is never curative.

The reason a cure is not possible is down to the special form and spread of the glioblastoma. Nevertheless, an operation helps. This seems to be because removing the main tumor mass maybe has a positive immunological effect. But it may also be connected to the tumor’s network communication. The surgical intervention stimulates the network by increasing resistance.

If the main tumor mass is decreased through a surgical procedure, this results in an at least temporarily improved starting position for the patient until the mass regenerates. This could also be connected to the fact that tumor communication is not unregulated but is rather in accordance with a certain hierarchy and order, which requires a certain structure and mass.

The other aspect is that support can be requested via this communication. You can imagine that a cell connected to another cell via a conduit receives help from this other cell in the form of organelles by exchanging ions and that, for example, stress or toxicity can be much better balanced out in large networks than in small networks. That means that external attacks, such as a surgical intervention, can be much better balanced by a well-organized network than by isolated cells.
 

Resistance to chemotherapy

Q: How do irradiation and chemotherapy rank in the treatment of glioblastomas?

A: Irradiation is another therapeutic approach. It causes cells to be stuck in the growth phase of the cell cycle. The cells are not killed through radiation, but they are practically halted. And this arrest of the cell cycle is often sufficient to help people with glioblastomas for a very long time. But the same is true for irradiation as for surgery. This deep network of cells cannot be addressed.

Attempts have been made in the past to reduce the radiation dose to the extent that the brain is no longer damaged by it, but this low dose was then not sufficient to exert any control. If you want to control the tumor, the dose must be high and the volume must be correspondingly low, since there is a clear limit.

Every patient is offered alkylating chemotherapy. At the moment, just one substance is used here in the primary therapy: temozolomide. The problem with this is that two-thirds of tumors in all cells exhibit a resistance to this alkylating chemotherapy, which means that the efficacy of this therapy is highly limited in two-thirds of patients.

In the one-third of patients in whom this resistance is not present, the chemotherapy works fairly well. But even then, it is unfortunately only a matter of time until there is a relapse or disease progression. In my practice, this has always been the case, but there are people who have been living with this disease for 20 years now. There seem to be tumor cells that calmly and silently survive this phase of chemotherapy and then restart the cell cycle at some point.

Q: What do you think of alternating electric fields as a therapy option?

A: Therapy with alternating electric fields is currently being used and offered to patients. This means that patients who have survived well through radiochemotherapy should also be offered treatment with alternating electric fields.

However, what happens in this process is not as well understood as with other therapies. It is assumed that the cell cycle, i.e., cell division, is altered by disrupting the mitotic spindle. But you can imagine, and this is now speculation, but quite sound speculation I believe, that alternating electric fields also cause a certain amount of confusion in the previously described networks. But this still needs to be investigated in more detail.

It is not implausible. We know that such alternating electric fields disturb the organization of cell organelles. And we also know that for this communication, we need fairly good order and also organization. This would definitely be a starting point on the way to understanding why this therapy potentially shows a certain effect in some patients.
 

Nerve cell precursors

Q: Scientists from the UKHD and the DKFZ have discovered a new glioblastoma spreading strategy and have learned that the tumor cells imitate the properties and movement patterns of nerve cells. They are labeling the results a “milestone in the field of cancer neuroscience.” Could you explain a bit more?

A: Glioblastoma does not grow on its own as a solid mass, but instead, the entire brain is affected by the disease. The question of how the tumor’s individual cells move the main tumor mass from afar, how they get there, how they continue to be supplied, and what their interaction partners are – an entirely new light has been shed on all of this in our work.

The development of tumor cell mobility has been recognized as a remnant of brain development. The tumor cells have retained properties that the precursor cells for nervous-system development require for an organized nervous system to emerge from just a few cells. This means that the tumor cells copy or eventually retain properties of the nerve-cell precursors that, unlike mature nerve cells, are mobile to a fairly high degree.

Mobility here means that it can advance along a network, despite said network being very densely packed. This also means that certain processes, such as releasing and then continuing to move again, must function and that the communication regarding the original disease must be maintained.

First, we understand what the different glioblastoma cell types do, which molecular properties are associated with which behaviors, and which cell type (namely the swarming cells) is responsible for the invasive tumor growth. In contrast, the network-forming cell type, which only develops from these, is responsible for the resistance.
 

Interrupting communication

Q: Which starting points for new therapies do you see?

A: In terms of new therapies, these movement phenomena are one good starting point. The other starting point – I find this one much more interesting – is that the programming steps that these tumor cells use [are] no longer needed. This is because our mature nervous system no longer requires this program, which was necessary for the mobility of cells in development.

Our central nervous system exhibits little cell movement. This is to do with programs of nervous-system development that are switched off in the mature nervous system. But they are then reactivated or remain active in the tumor cells. This process reveals potential starting points for therapy.

Addressing the movement of cells, that has been investigated for the last 20 years, but it seems to have an extraordinarily high number of side effects, because these movement mechanisms are also important for other, healthy cells in the body. For example, digestive mechanisms and other proliferation mechanisms, on mucous membranes, in the blood system, in the bone marrow, are then affected and no longer function.

There is another possible approach: the more-or-less specific interaction between the nerve cells and the tumor cells also offers starting points for therapies, from our point of view. The key word is epilepsy treatment. We know that people with brain tumors suffer badly, or worse than usual, from epileptic seizures. This was often regarded purely as a pressure problem. There is a disruptive element in the brain, and this causes the electrical activity in the brain to become disorganized. For some people, this can lead to seizures in certain situations.

The communication between tumor cells and nerve cells takes place via transmission substances, e.g., through the neurotransmitter glutamate. Now you can consider whether a “surplus” of communication, such as an excessively strong stimulus, can trigger epileptic seizures.

In this work, we demonstrate that by interrupting this communication, we can also prevent the movement of these cells and the growth, the proliferation, of these cells.

Q: What is the significance of parvoviruses for therapy?

A: The major topic for cancer is immunotherapy. And one option for performing immunotherapies lies with viruses. Parvoviruses are a plausible therapy for proliferating cells.

Parvoviruses are usually administered locally. This means that a surgical cavity is infected with the viruses and the tumor cells that remain after an operation will then hopefully be killed off by these viruses.

This is the first step and the immediate effect of virus therapy. The attempt is made to kill off cells in the same way as with a medication. The advantage of viruses is the high specificity, i.e., only dividing cells will be attacked. In addition, parvoviruses are so small that they can also spread well and circulate through the brain.

The second reason for immunotherapy is that when killing off cells with viruses, antigens are often released that otherwise would not be, depending on the virus. But it’s the case with parvoviruses. They integrate with the virus’s genetic material. When cells rupture, certain proteins are then revealed, hybrids of viruses and the human genome, and these are attractive to the immune system.

There is a whole range of studies on this subject. However, there are currently no randomized studies that directly compare the therapies. But the expectation is that the use of parvoviruses could be a good addition to therapy.

One limitation that should be mentioned is that the use of viruses may be beneficial for some patients, but it will not have an effect in every patient. What is exciting about parvoviruses is that these viruses can be injected via the bloodstream and still achieve a good effect in the brain.
 

Protein APG101

Q: How relevant is the recombinant protein APG101 to therapy?

A: APG101 is a protein that simulates the cell-death receptor CD95 and binds with a stable antibody fragment. By doing so, it blocks the signaling pathway between CD95 ligand and receptor. The interaction between the CD95 ligand and the CD95 receptor activates an intracellular signaling pathway, which in turn stimulates the invasive growth and migration of tumor cells.

APG101 blocks the CD95 ligand and thereby prevents the activation of the CD95 signaling pathway, which leads to a reduction in the invasive cell growth and migration.

Apoptosis, programmed cell death, is a system we have used throughout our evolution to kill off the cell components we no longer need. During tumor development, this system is perverted, so to speak. Here, the stimulation of this system does not actually lead to cell death but rather to cell movement (i.e., to cell mobility). And in principle, APG101 blocks this mobility.

To date, I only know of three studies in which the medication has been used for tumors. One study was published 8 years ago. We demonstrated that we can achieve a relatively good effect with APG101 in connection with repeat irradiation, compared with repeat irradiation alone. We consider this effect to most likely be due to this influence on cell mobility.

There is a study on primary therapy: a four-arm study by the Neuro-Oncological Working Group. The results are still not available, however. In addition, a study on primary therapy with APG101 is currently being conducted in China. It is investigating whether the mechanism of action influences mobility. Whether it will be pushed through as therapy remains to be seen.
 

Vaccinations and antigens

Q: Vaccinations are of course a part of immunotherapy. What is their status?

A: We are looking at the IDH1 protein, which is present in mutated form in a group of brain tumors, as a very good target for a vaccine. The reason is that the protein is present in its mutated form in every cell of the tumor but not in healthy cells. That is a prerequisite for immunotherapy.

We started a study with peptides a few years ago. These peptides are injected under the skin on the stomach and leg. They cause an immune response systemically and in the brain tumor. This immune response may cause an inflammatory reaction (we can demonstrate this inflammatory reaction). And in this noncontrolled study, the approach was successful, at least compared to historical controls. There is no randomized study with treatment-naive control patients.

However, we are cautious because we know that peptide, unlike CAR T cells or RNA-based vaccines, for example, only triggers a relatively small immune response in many patients. The scale of the immune response is important, rather than the specificity. The scale is probably not large enough in most patients for a long-term effect to be expected.

But there are exceptions. Patients we vaccinated many years ago still have a very remarkable immune status. But we also have patients in whom an immune status cannot even be seen anymore, after just a short period of time.

Therefore, our aim is to perform the immune strategy with more effective, stronger measures – not more specific, but stronger. Unfortunately, it is often the case with glioblastomas that there is not a single antigen that can be vaccinated against. Instead, a relatively large cocktail is needed, which unfortunately also often varies from patient to patient. The conditions are difficult.

Q: You mentioned that glioblastomas can be classified into subgroups. Does this improve the prognosis?

A: Yes, in certain subgroups the prognosis improves. That is the case with those usually very small groups that are molecularly well defined. I believe that by better understanding the individual groups, we have succeeded in making major progress in those groups. But where there is light, there is also shadow. We know that there are many groups with which we have not achieved a great deal.

Fundamental research leads to a better understanding, and the next step in this is to be able to adapt the therapy. Instead of it being one therapy for everyone, it will become a part of various differing therapies for these quite different groups. We are making a lot of progress with individual groups. But unfortunately, we have not come quite as far as we want with many patients.

This article was translated from the Medscape German edition. A version of this article first appeared on Medscape.com.

Every year, around 7,000 people in Germany develop a brain tumor, and around half of those cases involve a glioblastoma, a particularly aggressive form of the disease. Glioblastomas are incurable, but advances are being made in both diagnostics and therapy. Scientists from the Heidelberg University Hospital (UKHD) and from the German Cancer Research Center (DKFZ) in Heidelberg have discovered a fundamentally new way in which glioblastomas spread within the brain.

This news organization spoke to Wolfgang Wick, MD, medical director of the neurologic clinic at UKHD, about how glioblastomas are treated; the role that vaccinations, recombinant proteins, and parvoviruses play; and what therapeutic approaches might be derived from the discovery of this method by which glioblastomas spread.

Question: Glioblastomas spread through the brain like a fungal network. So how would a glioblastoma currently be treated? The tumor can only be partially removed through surgery.

Answer: Nevertheless, glioblastoma would be operated on. This would have a significant effect. Relieving the strain of the main tumor mass, without generating a new deficit, is prognostically very good for the patient concerned. However, surgery on glioblastoma is never curative.

The reason a cure is not possible is down to the special form and spread of the glioblastoma. Nevertheless, an operation helps. This seems to be because removing the main tumor mass maybe has a positive immunological effect. But it may also be connected to the tumor’s network communication. The surgical intervention stimulates the network by increasing resistance.

If the main tumor mass is decreased through a surgical procedure, this results in an at least temporarily improved starting position for the patient until the mass regenerates. This could also be connected to the fact that tumor communication is not unregulated but is rather in accordance with a certain hierarchy and order, which requires a certain structure and mass.

The other aspect is that support can be requested via this communication. You can imagine that a cell connected to another cell via a conduit receives help from this other cell in the form of organelles by exchanging ions and that, for example, stress or toxicity can be much better balanced out in large networks than in small networks. That means that external attacks, such as a surgical intervention, can be much better balanced by a well-organized network than by isolated cells.
 

Resistance to chemotherapy

Q: How do irradiation and chemotherapy rank in the treatment of glioblastomas?

A: Irradiation is another therapeutic approach. It causes cells to be stuck in the growth phase of the cell cycle. The cells are not killed through radiation, but they are practically halted. And this arrest of the cell cycle is often sufficient to help people with glioblastomas for a very long time. But the same is true for irradiation as for surgery. This deep network of cells cannot be addressed.

Attempts have been made in the past to reduce the radiation dose to the extent that the brain is no longer damaged by it, but this low dose was then not sufficient to exert any control. If you want to control the tumor, the dose must be high and the volume must be correspondingly low, since there is a clear limit.

Every patient is offered alkylating chemotherapy. At the moment, just one substance is used here in the primary therapy: temozolomide. The problem with this is that two-thirds of tumors in all cells exhibit a resistance to this alkylating chemotherapy, which means that the efficacy of this therapy is highly limited in two-thirds of patients.

In the one-third of patients in whom this resistance is not present, the chemotherapy works fairly well. But even then, it is unfortunately only a matter of time until there is a relapse or disease progression. In my practice, this has always been the case, but there are people who have been living with this disease for 20 years now. There seem to be tumor cells that calmly and silently survive this phase of chemotherapy and then restart the cell cycle at some point.

Q: What do you think of alternating electric fields as a therapy option?

A: Therapy with alternating electric fields is currently being used and offered to patients. This means that patients who have survived well through radiochemotherapy should also be offered treatment with alternating electric fields.

However, what happens in this process is not as well understood as with other therapies. It is assumed that the cell cycle, i.e., cell division, is altered by disrupting the mitotic spindle. But you can imagine, and this is now speculation, but quite sound speculation I believe, that alternating electric fields also cause a certain amount of confusion in the previously described networks. But this still needs to be investigated in more detail.

It is not implausible. We know that such alternating electric fields disturb the organization of cell organelles. And we also know that for this communication, we need fairly good order and also organization. This would definitely be a starting point on the way to understanding why this therapy potentially shows a certain effect in some patients.
 

Nerve cell precursors

Q: Scientists from the UKHD and the DKFZ have discovered a new glioblastoma spreading strategy and have learned that the tumor cells imitate the properties and movement patterns of nerve cells. They are labeling the results a “milestone in the field of cancer neuroscience.” Could you explain a bit more?

A: Glioblastoma does not grow on its own as a solid mass, but instead, the entire brain is affected by the disease. The question of how the tumor’s individual cells move the main tumor mass from afar, how they get there, how they continue to be supplied, and what their interaction partners are – an entirely new light has been shed on all of this in our work.

The development of tumor cell mobility has been recognized as a remnant of brain development. The tumor cells have retained properties that the precursor cells for nervous-system development require for an organized nervous system to emerge from just a few cells. This means that the tumor cells copy or eventually retain properties of the nerve-cell precursors that, unlike mature nerve cells, are mobile to a fairly high degree.

Mobility here means that it can advance along a network, despite said network being very densely packed. This also means that certain processes, such as releasing and then continuing to move again, must function and that the communication regarding the original disease must be maintained.

First, we understand what the different glioblastoma cell types do, which molecular properties are associated with which behaviors, and which cell type (namely the swarming cells) is responsible for the invasive tumor growth. In contrast, the network-forming cell type, which only develops from these, is responsible for the resistance.
 

Interrupting communication

Q: Which starting points for new therapies do you see?

A: In terms of new therapies, these movement phenomena are one good starting point. The other starting point – I find this one much more interesting – is that the programming steps that these tumor cells use [are] no longer needed. This is because our mature nervous system no longer requires this program, which was necessary for the mobility of cells in development.

Our central nervous system exhibits little cell movement. This is to do with programs of nervous-system development that are switched off in the mature nervous system. But they are then reactivated or remain active in the tumor cells. This process reveals potential starting points for therapy.

Addressing the movement of cells, that has been investigated for the last 20 years, but it seems to have an extraordinarily high number of side effects, because these movement mechanisms are also important for other, healthy cells in the body. For example, digestive mechanisms and other proliferation mechanisms, on mucous membranes, in the blood system, in the bone marrow, are then affected and no longer function.

There is another possible approach: the more-or-less specific interaction between the nerve cells and the tumor cells also offers starting points for therapies, from our point of view. The key word is epilepsy treatment. We know that people with brain tumors suffer badly, or worse than usual, from epileptic seizures. This was often regarded purely as a pressure problem. There is a disruptive element in the brain, and this causes the electrical activity in the brain to become disorganized. For some people, this can lead to seizures in certain situations.

The communication between tumor cells and nerve cells takes place via transmission substances, e.g., through the neurotransmitter glutamate. Now you can consider whether a “surplus” of communication, such as an excessively strong stimulus, can trigger epileptic seizures.

In this work, we demonstrate that by interrupting this communication, we can also prevent the movement of these cells and the growth, the proliferation, of these cells.

Q: What is the significance of parvoviruses for therapy?

A: The major topic for cancer is immunotherapy. And one option for performing immunotherapies lies with viruses. Parvoviruses are a plausible therapy for proliferating cells.

Parvoviruses are usually administered locally. This means that a surgical cavity is infected with the viruses and the tumor cells that remain after an operation will then hopefully be killed off by these viruses.

This is the first step and the immediate effect of virus therapy. The attempt is made to kill off cells in the same way as with a medication. The advantage of viruses is the high specificity, i.e., only dividing cells will be attacked. In addition, parvoviruses are so small that they can also spread well and circulate through the brain.

The second reason for immunotherapy is that when killing off cells with viruses, antigens are often released that otherwise would not be, depending on the virus. But it’s the case with parvoviruses. They integrate with the virus’s genetic material. When cells rupture, certain proteins are then revealed, hybrids of viruses and the human genome, and these are attractive to the immune system.

There is a whole range of studies on this subject. However, there are currently no randomized studies that directly compare the therapies. But the expectation is that the use of parvoviruses could be a good addition to therapy.

One limitation that should be mentioned is that the use of viruses may be beneficial for some patients, but it will not have an effect in every patient. What is exciting about parvoviruses is that these viruses can be injected via the bloodstream and still achieve a good effect in the brain.
 

Protein APG101

Q: How relevant is the recombinant protein APG101 to therapy?

A: APG101 is a protein that simulates the cell-death receptor CD95 and binds with a stable antibody fragment. By doing so, it blocks the signaling pathway between CD95 ligand and receptor. The interaction between the CD95 ligand and the CD95 receptor activates an intracellular signaling pathway, which in turn stimulates the invasive growth and migration of tumor cells.

APG101 blocks the CD95 ligand and thereby prevents the activation of the CD95 signaling pathway, which leads to a reduction in the invasive cell growth and migration.

Apoptosis, programmed cell death, is a system we have used throughout our evolution to kill off the cell components we no longer need. During tumor development, this system is perverted, so to speak. Here, the stimulation of this system does not actually lead to cell death but rather to cell movement (i.e., to cell mobility). And in principle, APG101 blocks this mobility.

To date, I only know of three studies in which the medication has been used for tumors. One study was published 8 years ago. We demonstrated that we can achieve a relatively good effect with APG101 in connection with repeat irradiation, compared with repeat irradiation alone. We consider this effect to most likely be due to this influence on cell mobility.

There is a study on primary therapy: a four-arm study by the Neuro-Oncological Working Group. The results are still not available, however. In addition, a study on primary therapy with APG101 is currently being conducted in China. It is investigating whether the mechanism of action influences mobility. Whether it will be pushed through as therapy remains to be seen.
 

Vaccinations and antigens

Q: Vaccinations are of course a part of immunotherapy. What is their status?

A: We are looking at the IDH1 protein, which is present in mutated form in a group of brain tumors, as a very good target for a vaccine. The reason is that the protein is present in its mutated form in every cell of the tumor but not in healthy cells. That is a prerequisite for immunotherapy.

We started a study with peptides a few years ago. These peptides are injected under the skin on the stomach and leg. They cause an immune response systemically and in the brain tumor. This immune response may cause an inflammatory reaction (we can demonstrate this inflammatory reaction). And in this noncontrolled study, the approach was successful, at least compared to historical controls. There is no randomized study with treatment-naive control patients.

However, we are cautious because we know that peptide, unlike CAR T cells or RNA-based vaccines, for example, only triggers a relatively small immune response in many patients. The scale of the immune response is important, rather than the specificity. The scale is probably not large enough in most patients for a long-term effect to be expected.

But there are exceptions. Patients we vaccinated many years ago still have a very remarkable immune status. But we also have patients in whom an immune status cannot even be seen anymore, after just a short period of time.

Therefore, our aim is to perform the immune strategy with more effective, stronger measures – not more specific, but stronger. Unfortunately, it is often the case with glioblastomas that there is not a single antigen that can be vaccinated against. Instead, a relatively large cocktail is needed, which unfortunately also often varies from patient to patient. The conditions are difficult.

Q: You mentioned that glioblastomas can be classified into subgroups. Does this improve the prognosis?

A: Yes, in certain subgroups the prognosis improves. That is the case with those usually very small groups that are molecularly well defined. I believe that by better understanding the individual groups, we have succeeded in making major progress in those groups. But where there is light, there is also shadow. We know that there are many groups with which we have not achieved a great deal.

Fundamental research leads to a better understanding, and the next step in this is to be able to adapt the therapy. Instead of it being one therapy for everyone, it will become a part of various differing therapies for these quite different groups. We are making a lot of progress with individual groups. But unfortunately, we have not come quite as far as we want with many patients.

This article was translated from the Medscape German edition. A version of this article first appeared on Medscape.com.

Every year, around 7,000 people in Germany develop a brain tumor, and around half of those cases involve a glioblastoma, a particularly aggressive form of the disease. Glioblastomas are incurable, but advances are being made in both diagnostics and therapy. Scientists from the Heidelberg University Hospital (UKHD) and from the German Cancer Research Center (DKFZ) in Heidelberg have discovered a fundamentally new way in which glioblastomas spread within the brain.

This news organization spoke to Wolfgang Wick, MD, medical director of the neurologic clinic at UKHD, about how glioblastomas are treated; the role that vaccinations, recombinant proteins, and parvoviruses play; and what therapeutic approaches might be derived from the discovery of this method by which glioblastomas spread.

Question: Glioblastomas spread through the brain like a fungal network. So how would a glioblastoma currently be treated? The tumor can only be partially removed through surgery.

Answer: Nevertheless, glioblastoma would be operated on. This would have a significant effect. Relieving the strain of the main tumor mass, without generating a new deficit, is prognostically very good for the patient concerned. However, surgery on glioblastoma is never curative.

The reason a cure is not possible is down to the special form and spread of the glioblastoma. Nevertheless, an operation helps. This seems to be because removing the main tumor mass maybe has a positive immunological effect. But it may also be connected to the tumor’s network communication. The surgical intervention stimulates the network by increasing resistance.

If the main tumor mass is decreased through a surgical procedure, this results in an at least temporarily improved starting position for the patient until the mass regenerates. This could also be connected to the fact that tumor communication is not unregulated but is rather in accordance with a certain hierarchy and order, which requires a certain structure and mass.

The other aspect is that support can be requested via this communication. You can imagine that a cell connected to another cell via a conduit receives help from this other cell in the form of organelles by exchanging ions and that, for example, stress or toxicity can be much better balanced out in large networks than in small networks. That means that external attacks, such as a surgical intervention, can be much better balanced by a well-organized network than by isolated cells.
 

Resistance to chemotherapy

Q: How do irradiation and chemotherapy rank in the treatment of glioblastomas?

A: Irradiation is another therapeutic approach. It causes cells to be stuck in the growth phase of the cell cycle. The cells are not killed through radiation, but they are practically halted. And this arrest of the cell cycle is often sufficient to help people with glioblastomas for a very long time. But the same is true for irradiation as for surgery. This deep network of cells cannot be addressed.

Attempts have been made in the past to reduce the radiation dose to the extent that the brain is no longer damaged by it, but this low dose was then not sufficient to exert any control. If you want to control the tumor, the dose must be high and the volume must be correspondingly low, since there is a clear limit.

Every patient is offered alkylating chemotherapy. At the moment, just one substance is used here in the primary therapy: temozolomide. The problem with this is that two-thirds of tumors in all cells exhibit a resistance to this alkylating chemotherapy, which means that the efficacy of this therapy is highly limited in two-thirds of patients.

In the one-third of patients in whom this resistance is not present, the chemotherapy works fairly well. But even then, it is unfortunately only a matter of time until there is a relapse or disease progression. In my practice, this has always been the case, but there are people who have been living with this disease for 20 years now. There seem to be tumor cells that calmly and silently survive this phase of chemotherapy and then restart the cell cycle at some point.

Q: What do you think of alternating electric fields as a therapy option?

A: Therapy with alternating electric fields is currently being used and offered to patients. This means that patients who have survived well through radiochemotherapy should also be offered treatment with alternating electric fields.

However, what happens in this process is not as well understood as with other therapies. It is assumed that the cell cycle, i.e., cell division, is altered by disrupting the mitotic spindle. But you can imagine, and this is now speculation, but quite sound speculation I believe, that alternating electric fields also cause a certain amount of confusion in the previously described networks. But this still needs to be investigated in more detail.

It is not implausible. We know that such alternating electric fields disturb the organization of cell organelles. And we also know that for this communication, we need fairly good order and also organization. This would definitely be a starting point on the way to understanding why this therapy potentially shows a certain effect in some patients.
 

Nerve cell precursors

Q: Scientists from the UKHD and the DKFZ have discovered a new glioblastoma spreading strategy and have learned that the tumor cells imitate the properties and movement patterns of nerve cells. They are labeling the results a “milestone in the field of cancer neuroscience.” Could you explain a bit more?

A: Glioblastoma does not grow on its own as a solid mass, but instead, the entire brain is affected by the disease. The question of how the tumor’s individual cells move the main tumor mass from afar, how they get there, how they continue to be supplied, and what their interaction partners are – an entirely new light has been shed on all of this in our work.

The development of tumor cell mobility has been recognized as a remnant of brain development. The tumor cells have retained properties that the precursor cells for nervous-system development require for an organized nervous system to emerge from just a few cells. This means that the tumor cells copy or eventually retain properties of the nerve-cell precursors that, unlike mature nerve cells, are mobile to a fairly high degree.

Mobility here means that it can advance along a network, despite said network being very densely packed. This also means that certain processes, such as releasing and then continuing to move again, must function and that the communication regarding the original disease must be maintained.

First, we understand what the different glioblastoma cell types do, which molecular properties are associated with which behaviors, and which cell type (namely the swarming cells) is responsible for the invasive tumor growth. In contrast, the network-forming cell type, which only develops from these, is responsible for the resistance.
 

Interrupting communication

Q: Which starting points for new therapies do you see?

A: In terms of new therapies, these movement phenomena are one good starting point. The other starting point – I find this one much more interesting – is that the programming steps that these tumor cells use [are] no longer needed. This is because our mature nervous system no longer requires this program, which was necessary for the mobility of cells in development.

Our central nervous system exhibits little cell movement. This is to do with programs of nervous-system development that are switched off in the mature nervous system. But they are then reactivated or remain active in the tumor cells. This process reveals potential starting points for therapy.

Addressing the movement of cells, that has been investigated for the last 20 years, but it seems to have an extraordinarily high number of side effects, because these movement mechanisms are also important for other, healthy cells in the body. For example, digestive mechanisms and other proliferation mechanisms, on mucous membranes, in the blood system, in the bone marrow, are then affected and no longer function.

There is another possible approach: the more-or-less specific interaction between the nerve cells and the tumor cells also offers starting points for therapies, from our point of view. The key word is epilepsy treatment. We know that people with brain tumors suffer badly, or worse than usual, from epileptic seizures. This was often regarded purely as a pressure problem. There is a disruptive element in the brain, and this causes the electrical activity in the brain to become disorganized. For some people, this can lead to seizures in certain situations.

The communication between tumor cells and nerve cells takes place via transmission substances, e.g., through the neurotransmitter glutamate. Now you can consider whether a “surplus” of communication, such as an excessively strong stimulus, can trigger epileptic seizures.

In this work, we demonstrate that by interrupting this communication, we can also prevent the movement of these cells and the growth, the proliferation, of these cells.

Q: What is the significance of parvoviruses for therapy?

A: The major topic for cancer is immunotherapy. And one option for performing immunotherapies lies with viruses. Parvoviruses are a plausible therapy for proliferating cells.

Parvoviruses are usually administered locally. This means that a surgical cavity is infected with the viruses and the tumor cells that remain after an operation will then hopefully be killed off by these viruses.

This is the first step and the immediate effect of virus therapy. The attempt is made to kill off cells in the same way as with a medication. The advantage of viruses is the high specificity, i.e., only dividing cells will be attacked. In addition, parvoviruses are so small that they can also spread well and circulate through the brain.

The second reason for immunotherapy is that when killing off cells with viruses, antigens are often released that otherwise would not be, depending on the virus. But it’s the case with parvoviruses. They integrate with the virus’s genetic material. When cells rupture, certain proteins are then revealed, hybrids of viruses and the human genome, and these are attractive to the immune system.

There is a whole range of studies on this subject. However, there are currently no randomized studies that directly compare the therapies. But the expectation is that the use of parvoviruses could be a good addition to therapy.

One limitation that should be mentioned is that the use of viruses may be beneficial for some patients, but it will not have an effect in every patient. What is exciting about parvoviruses is that these viruses can be injected via the bloodstream and still achieve a good effect in the brain.
 

Protein APG101

Q: How relevant is the recombinant protein APG101 to therapy?

A: APG101 is a protein that simulates the cell-death receptor CD95 and binds with a stable antibody fragment. By doing so, it blocks the signaling pathway between CD95 ligand and receptor. The interaction between the CD95 ligand and the CD95 receptor activates an intracellular signaling pathway, which in turn stimulates the invasive growth and migration of tumor cells.

APG101 blocks the CD95 ligand and thereby prevents the activation of the CD95 signaling pathway, which leads to a reduction in the invasive cell growth and migration.

Apoptosis, programmed cell death, is a system we have used throughout our evolution to kill off the cell components we no longer need. During tumor development, this system is perverted, so to speak. Here, the stimulation of this system does not actually lead to cell death but rather to cell movement (i.e., to cell mobility). And in principle, APG101 blocks this mobility.

To date, I only know of three studies in which the medication has been used for tumors. One study was published 8 years ago. We demonstrated that we can achieve a relatively good effect with APG101 in connection with repeat irradiation, compared with repeat irradiation alone. We consider this effect to most likely be due to this influence on cell mobility.

There is a study on primary therapy: a four-arm study by the Neuro-Oncological Working Group. The results are still not available, however. In addition, a study on primary therapy with APG101 is currently being conducted in China. It is investigating whether the mechanism of action influences mobility. Whether it will be pushed through as therapy remains to be seen.
 

Vaccinations and antigens

Q: Vaccinations are of course a part of immunotherapy. What is their status?

A: We are looking at the IDH1 protein, which is present in mutated form in a group of brain tumors, as a very good target for a vaccine. The reason is that the protein is present in its mutated form in every cell of the tumor but not in healthy cells. That is a prerequisite for immunotherapy.

We started a study with peptides a few years ago. These peptides are injected under the skin on the stomach and leg. They cause an immune response systemically and in the brain tumor. This immune response may cause an inflammatory reaction (we can demonstrate this inflammatory reaction). And in this noncontrolled study, the approach was successful, at least compared to historical controls. There is no randomized study with treatment-naive control patients.

However, we are cautious because we know that peptide, unlike CAR T cells or RNA-based vaccines, for example, only triggers a relatively small immune response in many patients. The scale of the immune response is important, rather than the specificity. The scale is probably not large enough in most patients for a long-term effect to be expected.

But there are exceptions. Patients we vaccinated many years ago still have a very remarkable immune status. But we also have patients in whom an immune status cannot even be seen anymore, after just a short period of time.

Therefore, our aim is to perform the immune strategy with more effective, stronger measures – not more specific, but stronger. Unfortunately, it is often the case with glioblastomas that there is not a single antigen that can be vaccinated against. Instead, a relatively large cocktail is needed, which unfortunately also often varies from patient to patient. The conditions are difficult.

Q: You mentioned that glioblastomas can be classified into subgroups. Does this improve the prognosis?

A: Yes, in certain subgroups the prognosis improves. That is the case with those usually very small groups that are molecularly well defined. I believe that by better understanding the individual groups, we have succeeded in making major progress in those groups. But where there is light, there is also shadow. We know that there are many groups with which we have not achieved a great deal.

Fundamental research leads to a better understanding, and the next step in this is to be able to adapt the therapy. Instead of it being one therapy for everyone, it will become a part of various differing therapies for these quite different groups. We are making a lot of progress with individual groups. But unfortunately, we have not come quite as far as we want with many patients.

This article was translated from the Medscape German edition. A version of this article first appeared on Medscape.com.

“A sad day. A new low point in the spiral of hate, violence, and lies. Behind every account, there is a person. Do not forget that. In loving memory,” a Twitter user wrote about the death of Lisa-Maria Kellermayr, MD.

“This outcome is very saddening indeed. It should cause everyone to reflect. About interactions in our society, about ‘social’ media, about tolerance, about consideration, and about freedom,” tweeted Dirk Heinrich, MD, chair of the Virchow Association.

The suspected suicide of Dr. Kellermayr, an Austrian vaccinator, is stirring emotions in Germany, too. The active exponent and supporter of COVID-19 measures had been seriously threatened by anti-vaxxers and pandemic deniers. Thousands of people in Vienna said goodbye to her with a solemn vigil. Dr. Kellermayr’s death raises the question of how life-threatening online hatred can be.

Dr. Kellermayr, a vaccination campaigner, had received hateful comments and death threats since the start of the pandemic. But a single post on Twitter changed everything. On Nov. 16, 2021, anti-vaxxers held a demonstration outside the Wels-Grieskirchen Hospital. Dr. Kellermayr tweeted in disgust, “Today in Wels: A demonstration by conspiracy theorists spills into the street under the gaze of the authorities and blocks both the main hospital entrance and the Red Cross ambulance exit.”

At the time of her tweet, Dr. Kellermayr was not aware of additional access that had been made available for ambulances. The police reacted to her tweet, calling it a “false report.” As Florian Klenk writes in the Austrian journal Falter, the police basically criticized Dr. Kellermayr publicly, including in front of the 12,000 Twitter users who follow the police on Twitter.

A screenshot of Dr. Kellermayr’s tweet and the authorities’ response went viral on relevant Telegram forums and triggered a flood of hatred. A COVID denier immediately posted her address online.

Dr. Kellermayr deleted her tweet and asked the police to also delete their tweet, but they did not respond, and the tweet remained online. The country physician was inundated with insults, slurs, and death threats. She was beset by alleged patients who came only to disrupt her work, take videos on their cell phones, and share the photos in anti-vaxxer groups. She privately paid for a security guard, who confiscated butterfly knives from multiple “patients” on their way into the waiting room. Dr. Kellermayr looked for help from the medical association, the police, and the Office for the Protection of the Constitution. She made her problem public.
 

Police recommend supervision

Dr. Kellermayr received emails in which the senders described in detail how they would kill her and her practice team. The physician took the threats seriously; the police did not. The officers investigated. With the evidence that the perpetrators were operating via the dark web, the officers insinuated to Dr. Kellermayr that it was not possible to find them, Klenk reported.

Dr. Kellermayr filed a complaint for the first time on Nov. 22, 2021. The law enforcement authorities in Upper Austria said they did not have domestic jurisdiction. The Austrian authorities launched another investigation. The German prosecution authorities joined the search for those posting death threats on social media. Even the Munich chief public prosecutor’s office and the Berlin public prosecutor’s office investigated the case.

According to some reports, Dr. Kellermayr did not receive police protection; a patrol was sent over from time to time. According to the police, she should “not be afraid,” and if she was, she should just call them. She was also advised to undergo supervision -- in other words, psychological treatment.

Those who had the power to help her provided no support. On the contrary, the spokesperson for the Upper Austria Police said in the Ö1 Mittagsjournal radio program that Dr. Kellermayr was “putting herself in the public eye for her own selfish benefit.” Even Peter Niedermoser, president of the Medical Association of Upper Austria, told the Austrian daily newspaper Standard, “I understand that you have to defend yourself, but it is a whole other question as to whether you have to discuss every topic to excess on Twitter. Sometimes it’s better to step away.”
 

Leaving Twitter

A German network specialist who hunts pedophiles online offered Dr. Kellermayr her help and was quickly on the trail of suspects, including a neo-Nazi from the Berlin area and a man from Upper Bavaria. Then the Office for the Protection of the Constitution stepped in. Omar Haijawi-Pirchner, head of the Austrian State Security and Intelligence Directorate, stated that the evidence provided by the network specialist would be pursued.

At the end of June, Dr. Kellermayr closed her practice. The situation was no longer tolerable for her staff, and the costs for security, €100,000 up to that point, were no longer manageable. At the start of July, she announced that she wanted to reopen the practice.

In her suicide note to the Upper Austria State Police Department, she wrote “that there was a lot of talking, but no one did anything.” In her letter to her medical association, she also made it clear that she had felt abandoned.

“Every suicide is a tragedy. This one more so: a woman in need was abandoned by the police and authorities. That is a social failure,” tweeted physicist and author Florian Aigner.

“Threatened. Ruined. Left alone by the state. Because she did her job. Because she got involved. Because she spread information. Because many want to be understanding for the self-styled ‘unconventional thinkers,’ the ‘Querdenker.’ Because many did not want to take the threat seriously. Because we tolerate them,” tweeted the intensive care physician Lämêth.

“Many colleagues using their real names get all of this outside of Twitter too: emails, phone calls, letters, or even visits by radical fanatics. If you are lucky, there is police protection, or a few reports, but often not a lot happens juridically,” tweeted Flow, anesthetist and emergency physician.

“More and more of the people who shaped Twitter by spreading reliable information voluntarily are now backing out. As long as the concept of freedom is abused here for hate and intimidation, individual responsibility can only mean self-defense. Sad,” wrote Christian Lübbers, MD, on Twitter. Since the ENT physician started vaccinating patients against COVID-19, he has been tormented with insults and death threats from anti-vaxxers and COVID deniers, this news organization has reported.

Examples of people who have backed out and deactivated their account are the virologist Isabella Eckerlek, MD, PhD, of the University of Geneva, and Natalie Grams, MD, spokesperson for the Information Network Homeopathy. For a long time, they spread information about COVID-19, corrected false assertions, and were increasingly faced with insults and hostility.

General practitioner Christian Kröner, MD, has repeatedly been the target of threats and insults and has been under police protection from time to time. He made a statement regarding Dr. Kellermayr’s death and has shut down his account for the first time following multiple instances of hostility.
 

Harassment continues

The hatred, harassment, and slander have not stopped, even after Dr. Kellermayr’s death. Harald Laatsch, who sits in the Berlin house of representatives for the Alternative for Germany party, commented that it seems “much more likely that she could no longer live with the heavy guilt of being a vaccine propagandist.”

“It is repulsive how the Querdenker deride a medical colleague who was driven to death by harassment and violence. She lost her life by saving the lives of others. Others are continuing her work. The state must protect people like her,” tweeted Karl Lauterbach, MD, PhD, who has also been overrun with hate campaigns by Querdenker and COVID deniers.

The page “Ich habe mitgemacht” – Das Archiv für Corona-Unrecht [“I Joined In” – The Archive for COVID Injustice] probably did not help to deescalate the situation on Twitter. Anonymous archivists there collect allegedly ostracizing quotes and share them, along with names. The context in which these statements were given at the time is not mentioned. Some politicians and journalists have given this online pillory the name, “We joined in! We have ostracized, defamed...”

Being humiliated and defamed is par for the course for those who spread information across social media. As doctor and politician Rainer Röver, MD, wrote, “Whoever is involved in spreading information, science, fighting against fake news, and protecting the patients, pupils, clients, or mandates entrusted to them is being shouted down, threatened in writing, or driven to suicide.” The lying, baiting mob is taking over sovereignty of the discussion. According to Röver, the politicians are doing nothing “to actually put a stop to the violent mob.”

For some time now, the Federal Criminal Police Office (BKA) of Germany has considered anti-vaxxers or COVID deniers as a “relevant risk” in connection with attacks on vaccination centers or medical practices.
 

Increasing aggression

At the start of November last year, participants at the 125th German Medical Assembly demanded that violence against health care professionals be outlawed, Mark Berger, deputy spokesperson of the German Medical Association (BÄK), recollected. At the assembly, various medical associations shared reports of an increase in aggression during the pandemic.

The State Medical Chamber of Physicians of Saxony confirmed threats of violence against physicians, death threats against employees of the Vaccination Committee of Saxony, and criminal damage to medical practices that administer vaccinations. Physicians who administer vaccines in schools receive abuse.

Owing to the increasing amount of aggression, the State Medical Association of Thuringia has set up a special email address as a first point of contact to report violence for those who are affected. “In recent months, we have received a large number of reports from physicians who have received threatening letters in relation to the COVID vaccination, or letters purporting to be liability information or notices of liability,” explained the association. In the cases of which the association becomes aware, a criminal charge is issued most of the time. The investigative proceedings are ongoing.

The State Medical Association of Hesse has devised a reporting form with which it can obtain information on the forms of violence inflicted against physicians and their teams. The reporting is anonymous, and the data are statistically analyzed.

Peter Bobbert, MD, PhD, president of the Berlin Medical Association, provided reports of threat scenarios, “the kind and frequency of which we have never experienced.” He received many messages from physicians asking for help because they had received threatening letters or because their addresses had been posted on social networks.

To date, there have only been isolated cases, said Oliver Erens, MD, spokesperson of the State Medical Association of Baden-Württemberg. “But it is true that some colleagues have already had these kinds of experiences.” Those affected have primarily reported “discussions, debates, and verbal altercations with patients on the topic of the COVID vaccination, compliance with the mask mandate, and other COVID-containment measures – definitely with a high potential for aggression from some of the patients,” said Dr. Erens. Cases of physical violence have not been reported to date.

Above all, there has been a need for advice over the phone, predominantly in the legal department of the regional medical associations. “All physicians and their teams are being recommended by their associations to consistently prosecute any cases of threat of, or use of, violence against them,” Dr. Erens said. In October 2021, the University of Heidelberg started a study on the victimization of physicians. The analysis is ongoing.
 

Staying on Twitter

Lübbers considered leaving Twitter but decided against it. “I decided not to do it and to carry on spreading information about pseudo-medicine and vaccination. I see this as necessary civic courage and will not give way to hate,” Lübbers tweeted.

As understandable as any departure is, “we must not surrender Twitter to the trolls and harassers. Who is still here? #Iamstaying,” wrote Flow. Others wrote, “I will stay on Twitter as a physician. With my real name, too. [...] We must not surrender it to the Querdenker, idiots, Nazis, and enemies of freedom.”

“We need people to share information, we need voices of reason, just as Kellermayr was. How can you say that it would be better to remain silent? Does everyone who is against idiocy, Querdenker, and conspiracy theorists now have to remain silent?” asked Janos Hegedüs, MD, in his podcast.

Hegedüs, who uncovers fake news about COVID-19 and vaccination, was and remains a frequent target of insults and threats. His attempts to take action against them has had only limited success. His conclusion is sobering. “If you decide to spread information, you should know: You are alone. You will get all of the hate and when you have a problem with it, no one will help you.”

Media attorney Chan-jo Jun, who for many years has taken a stand against hate and harassment, has deactivated his Twitter account. However, this is not a retreat, as he clarified in an interview with the German radio station Deutschlandfunk. “I do not intend to give up the fight against hate, harassment, and misinformation, but I will do it in a different place.”

He sees Dr. Kellermayr’s death as a turning point. “I thought that we had learned something after Lübcke [i.e., politician Walter Lübcke, who was murdered by a neo-Nazi]. But we are seeing that the death of a political opponent is not just the goal, but also a success for the other side. And that is shocking.”

The judicial means of taking action against hate are still not effective, said Mr. Jun. He also sees the platform operators as responsible, since they are not obliged to remove unlawful content. “German law and the German constitution hold no sway on Twitter.”
 

Right-wing extremism

What happened to Lisa-Maria Kellermayr is the same as targeted terrorism. An organized group set out to annihilate her. Social psychologist Pia Lamberty has spoken, in the context of COVID, about a pandemic of violence, the threatening nature of which has barely been recognized, both in the virtual and analog world.

In an article for the Jüdische Allgemeine, Dr. Lamberty criticizes the fact that “the mistakes made with Pegida [i.e., a far-right, Islamophobic political movement in Germany] are being made once again” in the classification of Querdenker and COVID deniers. From the very start, the protests against the COVID measures have been a rallying point in the mobilization of right-wing extremists. “The Querdenker movement is unifying radical, right-wing extremist elements. Antisemitism and racism were always welcome.” Still, the right-wing extremist motivation has not been clearly labeled as such.

The classification is not just a question of statistics. “It is also about analyzing the potential for danger and deriving political measures from this. And there is an urgent need for action here: The right-wing extremists will utilize the climate crisis, but also the war in Ukraine, attacks against refugees, and LGBTQ rights for further mobilization. Rather than the state, the focus of the attacks will be people who are labeled as the bogeyman. This also must be clearly labeled for what it is,” said Dr. Lamberty.
She wrote on Twitter, “The COVID-related attacks that took place in the last two years will not simply stop, they will shift. If we do not want more and more people to stop expressing themselves publicly, something urgently has to happen.” She added, “Once more: The next few months will be very difficult. This will probably also be accompanied by an increased level of threat for socially engaged people. More protection is urgently required.”

A version of this article first appeared on Medscape.com.

This article was translated from the Medscape German edition.

“A sad day. A new low point in the spiral of hate, violence, and lies. Behind every account, there is a person. Do not forget that. In loving memory,” a Twitter user wrote about the death of Lisa-Maria Kellermayr, MD.

“This outcome is very saddening indeed. It should cause everyone to reflect. About interactions in our society, about ‘social’ media, about tolerance, about consideration, and about freedom,” tweeted Dirk Heinrich, MD, chair of the Virchow Association.

The suspected suicide of Dr. Kellermayr, an Austrian vaccinator, is stirring emotions in Germany, too. The active exponent and supporter of COVID-19 measures had been seriously threatened by anti-vaxxers and pandemic deniers. Thousands of people in Vienna said goodbye to her with a solemn vigil. Dr. Kellermayr’s death raises the question of how life-threatening online hatred can be.

Dr. Kellermayr, a vaccination campaigner, had received hateful comments and death threats since the start of the pandemic. But a single post on Twitter changed everything. On Nov. 16, 2021, anti-vaxxers held a demonstration outside the Wels-Grieskirchen Hospital. Dr. Kellermayr tweeted in disgust, “Today in Wels: A demonstration by conspiracy theorists spills into the street under the gaze of the authorities and blocks both the main hospital entrance and the Red Cross ambulance exit.”

At the time of her tweet, Dr. Kellermayr was not aware of additional access that had been made available for ambulances. The police reacted to her tweet, calling it a “false report.” As Florian Klenk writes in the Austrian journal Falter, the police basically criticized Dr. Kellermayr publicly, including in front of the 12,000 Twitter users who follow the police on Twitter.

A screenshot of Dr. Kellermayr’s tweet and the authorities’ response went viral on relevant Telegram forums and triggered a flood of hatred. A COVID denier immediately posted her address online.

Dr. Kellermayr deleted her tweet and asked the police to also delete their tweet, but they did not respond, and the tweet remained online. The country physician was inundated with insults, slurs, and death threats. She was beset by alleged patients who came only to disrupt her work, take videos on their cell phones, and share the photos in anti-vaxxer groups. She privately paid for a security guard, who confiscated butterfly knives from multiple “patients” on their way into the waiting room. Dr. Kellermayr looked for help from the medical association, the police, and the Office for the Protection of the Constitution. She made her problem public.
 

Police recommend supervision

Dr. Kellermayr received emails in which the senders described in detail how they would kill her and her practice team. The physician took the threats seriously; the police did not. The officers investigated. With the evidence that the perpetrators were operating via the dark web, the officers insinuated to Dr. Kellermayr that it was not possible to find them, Klenk reported.

Dr. Kellermayr filed a complaint for the first time on Nov. 22, 2021. The law enforcement authorities in Upper Austria said they did not have domestic jurisdiction. The Austrian authorities launched another investigation. The German prosecution authorities joined the search for those posting death threats on social media. Even the Munich chief public prosecutor’s office and the Berlin public prosecutor’s office investigated the case.

According to some reports, Dr. Kellermayr did not receive police protection; a patrol was sent over from time to time. According to the police, she should “not be afraid,” and if she was, she should just call them. She was also advised to undergo supervision -- in other words, psychological treatment.

Those who had the power to help her provided no support. On the contrary, the spokesperson for the Upper Austria Police said in the Ö1 Mittagsjournal radio program that Dr. Kellermayr was “putting herself in the public eye for her own selfish benefit.” Even Peter Niedermoser, president of the Medical Association of Upper Austria, told the Austrian daily newspaper Standard, “I understand that you have to defend yourself, but it is a whole other question as to whether you have to discuss every topic to excess on Twitter. Sometimes it’s better to step away.”
 

Leaving Twitter

A German network specialist who hunts pedophiles online offered Dr. Kellermayr her help and was quickly on the trail of suspects, including a neo-Nazi from the Berlin area and a man from Upper Bavaria. Then the Office for the Protection of the Constitution stepped in. Omar Haijawi-Pirchner, head of the Austrian State Security and Intelligence Directorate, stated that the evidence provided by the network specialist would be pursued.

At the end of June, Dr. Kellermayr closed her practice. The situation was no longer tolerable for her staff, and the costs for security, €100,000 up to that point, were no longer manageable. At the start of July, she announced that she wanted to reopen the practice.

In her suicide note to the Upper Austria State Police Department, she wrote “that there was a lot of talking, but no one did anything.” In her letter to her medical association, she also made it clear that she had felt abandoned.

“Every suicide is a tragedy. This one more so: a woman in need was abandoned by the police and authorities. That is a social failure,” tweeted physicist and author Florian Aigner.

“Threatened. Ruined. Left alone by the state. Because she did her job. Because she got involved. Because she spread information. Because many want to be understanding for the self-styled ‘unconventional thinkers,’ the ‘Querdenker.’ Because many did not want to take the threat seriously. Because we tolerate them,” tweeted the intensive care physician Lämêth.

“Many colleagues using their real names get all of this outside of Twitter too: emails, phone calls, letters, or even visits by radical fanatics. If you are lucky, there is police protection, or a few reports, but often not a lot happens juridically,” tweeted Flow, anesthetist and emergency physician.

“More and more of the people who shaped Twitter by spreading reliable information voluntarily are now backing out. As long as the concept of freedom is abused here for hate and intimidation, individual responsibility can only mean self-defense. Sad,” wrote Christian Lübbers, MD, on Twitter. Since the ENT physician started vaccinating patients against COVID-19, he has been tormented with insults and death threats from anti-vaxxers and COVID deniers, this news organization has reported.

Examples of people who have backed out and deactivated their account are the virologist Isabella Eckerlek, MD, PhD, of the University of Geneva, and Natalie Grams, MD, spokesperson for the Information Network Homeopathy. For a long time, they spread information about COVID-19, corrected false assertions, and were increasingly faced with insults and hostility.

General practitioner Christian Kröner, MD, has repeatedly been the target of threats and insults and has been under police protection from time to time. He made a statement regarding Dr. Kellermayr’s death and has shut down his account for the first time following multiple instances of hostility.
 

Harassment continues

The hatred, harassment, and slander have not stopped, even after Dr. Kellermayr’s death. Harald Laatsch, who sits in the Berlin house of representatives for the Alternative for Germany party, commented that it seems “much more likely that she could no longer live with the heavy guilt of being a vaccine propagandist.”

“It is repulsive how the Querdenker deride a medical colleague who was driven to death by harassment and violence. She lost her life by saving the lives of others. Others are continuing her work. The state must protect people like her,” tweeted Karl Lauterbach, MD, PhD, who has also been overrun with hate campaigns by Querdenker and COVID deniers.

The page “Ich habe mitgemacht” – Das Archiv für Corona-Unrecht [“I Joined In” – The Archive for COVID Injustice] probably did not help to deescalate the situation on Twitter. Anonymous archivists there collect allegedly ostracizing quotes and share them, along with names. The context in which these statements were given at the time is not mentioned. Some politicians and journalists have given this online pillory the name, “We joined in! We have ostracized, defamed...”

Being humiliated and defamed is par for the course for those who spread information across social media. As doctor and politician Rainer Röver, MD, wrote, “Whoever is involved in spreading information, science, fighting against fake news, and protecting the patients, pupils, clients, or mandates entrusted to them is being shouted down, threatened in writing, or driven to suicide.” The lying, baiting mob is taking over sovereignty of the discussion. According to Röver, the politicians are doing nothing “to actually put a stop to the violent mob.”

For some time now, the Federal Criminal Police Office (BKA) of Germany has considered anti-vaxxers or COVID deniers as a “relevant risk” in connection with attacks on vaccination centers or medical practices.
 

Increasing aggression

At the start of November last year, participants at the 125th German Medical Assembly demanded that violence against health care professionals be outlawed, Mark Berger, deputy spokesperson of the German Medical Association (BÄK), recollected. At the assembly, various medical associations shared reports of an increase in aggression during the pandemic.

The State Medical Chamber of Physicians of Saxony confirmed threats of violence against physicians, death threats against employees of the Vaccination Committee of Saxony, and criminal damage to medical practices that administer vaccinations. Physicians who administer vaccines in schools receive abuse.

Owing to the increasing amount of aggression, the State Medical Association of Thuringia has set up a special email address as a first point of contact to report violence for those who are affected. “In recent months, we have received a large number of reports from physicians who have received threatening letters in relation to the COVID vaccination, or letters purporting to be liability information or notices of liability,” explained the association. In the cases of which the association becomes aware, a criminal charge is issued most of the time. The investigative proceedings are ongoing.

The State Medical Association of Hesse has devised a reporting form with which it can obtain information on the forms of violence inflicted against physicians and their teams. The reporting is anonymous, and the data are statistically analyzed.

Peter Bobbert, MD, PhD, president of the Berlin Medical Association, provided reports of threat scenarios, “the kind and frequency of which we have never experienced.” He received many messages from physicians asking for help because they had received threatening letters or because their addresses had been posted on social networks.

To date, there have only been isolated cases, said Oliver Erens, MD, spokesperson of the State Medical Association of Baden-Württemberg. “But it is true that some colleagues have already had these kinds of experiences.” Those affected have primarily reported “discussions, debates, and verbal altercations with patients on the topic of the COVID vaccination, compliance with the mask mandate, and other COVID-containment measures – definitely with a high potential for aggression from some of the patients,” said Dr. Erens. Cases of physical violence have not been reported to date.

Above all, there has been a need for advice over the phone, predominantly in the legal department of the regional medical associations. “All physicians and their teams are being recommended by their associations to consistently prosecute any cases of threat of, or use of, violence against them,” Dr. Erens said. In October 2021, the University of Heidelberg started a study on the victimization of physicians. The analysis is ongoing.
 

Staying on Twitter

Lübbers considered leaving Twitter but decided against it. “I decided not to do it and to carry on spreading information about pseudo-medicine and vaccination. I see this as necessary civic courage and will not give way to hate,” Lübbers tweeted.

As understandable as any departure is, “we must not surrender Twitter to the trolls and harassers. Who is still here? #Iamstaying,” wrote Flow. Others wrote, “I will stay on Twitter as a physician. With my real name, too. [...] We must not surrender it to the Querdenker, idiots, Nazis, and enemies of freedom.”

“We need people to share information, we need voices of reason, just as Kellermayr was. How can you say that it would be better to remain silent? Does everyone who is against idiocy, Querdenker, and conspiracy theorists now have to remain silent?” asked Janos Hegedüs, MD, in his podcast.

Hegedüs, who uncovers fake news about COVID-19 and vaccination, was and remains a frequent target of insults and threats. His attempts to take action against them has had only limited success. His conclusion is sobering. “If you decide to spread information, you should know: You are alone. You will get all of the hate and when you have a problem with it, no one will help you.”

Media attorney Chan-jo Jun, who for many years has taken a stand against hate and harassment, has deactivated his Twitter account. However, this is not a retreat, as he clarified in an interview with the German radio station Deutschlandfunk. “I do not intend to give up the fight against hate, harassment, and misinformation, but I will do it in a different place.”

He sees Dr. Kellermayr’s death as a turning point. “I thought that we had learned something after Lübcke [i.e., politician Walter Lübcke, who was murdered by a neo-Nazi]. But we are seeing that the death of a political opponent is not just the goal, but also a success for the other side. And that is shocking.”

The judicial means of taking action against hate are still not effective, said Mr. Jun. He also sees the platform operators as responsible, since they are not obliged to remove unlawful content. “German law and the German constitution hold no sway on Twitter.”
 

Right-wing extremism

What happened to Lisa-Maria Kellermayr is the same as targeted terrorism. An organized group set out to annihilate her. Social psychologist Pia Lamberty has spoken, in the context of COVID, about a pandemic of violence, the threatening nature of which has barely been recognized, both in the virtual and analog world.

In an article for the Jüdische Allgemeine, Dr. Lamberty criticizes the fact that “the mistakes made with Pegida [i.e., a far-right, Islamophobic political movement in Germany] are being made once again” in the classification of Querdenker and COVID deniers. From the very start, the protests against the COVID measures have been a rallying point in the mobilization of right-wing extremists. “The Querdenker movement is unifying radical, right-wing extremist elements. Antisemitism and racism were always welcome.” Still, the right-wing extremist motivation has not been clearly labeled as such.

The classification is not just a question of statistics. “It is also about analyzing the potential for danger and deriving political measures from this. And there is an urgent need for action here: The right-wing extremists will utilize the climate crisis, but also the war in Ukraine, attacks against refugees, and LGBTQ rights for further mobilization. Rather than the state, the focus of the attacks will be people who are labeled as the bogeyman. This also must be clearly labeled for what it is,” said Dr. Lamberty.
She wrote on Twitter, “The COVID-related attacks that took place in the last two years will not simply stop, they will shift. If we do not want more and more people to stop expressing themselves publicly, something urgently has to happen.” She added, “Once more: The next few months will be very difficult. This will probably also be accompanied by an increased level of threat for socially engaged people. More protection is urgently required.”

A version of this article first appeared on Medscape.com.

This article was translated from the Medscape German edition.

“A sad day. A new low point in the spiral of hate, violence, and lies. Behind every account, there is a person. Do not forget that. In loving memory,” a Twitter user wrote about the death of Lisa-Maria Kellermayr, MD.

“This outcome is very saddening indeed. It should cause everyone to reflect. About interactions in our society, about ‘social’ media, about tolerance, about consideration, and about freedom,” tweeted Dirk Heinrich, MD, chair of the Virchow Association.

The suspected suicide of Dr. Kellermayr, an Austrian vaccinator, is stirring emotions in Germany, too. The active exponent and supporter of COVID-19 measures had been seriously threatened by anti-vaxxers and pandemic deniers. Thousands of people in Vienna said goodbye to her with a solemn vigil. Dr. Kellermayr’s death raises the question of how life-threatening online hatred can be.

Dr. Kellermayr, a vaccination campaigner, had received hateful comments and death threats since the start of the pandemic. But a single post on Twitter changed everything. On Nov. 16, 2021, anti-vaxxers held a demonstration outside the Wels-Grieskirchen Hospital. Dr. Kellermayr tweeted in disgust, “Today in Wels: A demonstration by conspiracy theorists spills into the street under the gaze of the authorities and blocks both the main hospital entrance and the Red Cross ambulance exit.”

At the time of her tweet, Dr. Kellermayr was not aware of additional access that had been made available for ambulances. The police reacted to her tweet, calling it a “false report.” As Florian Klenk writes in the Austrian journal Falter, the police basically criticized Dr. Kellermayr publicly, including in front of the 12,000 Twitter users who follow the police on Twitter.

A screenshot of Dr. Kellermayr’s tweet and the authorities’ response went viral on relevant Telegram forums and triggered a flood of hatred. A COVID denier immediately posted her address online.

Dr. Kellermayr deleted her tweet and asked the police to also delete their tweet, but they did not respond, and the tweet remained online. The country physician was inundated with insults, slurs, and death threats. She was beset by alleged patients who came only to disrupt her work, take videos on their cell phones, and share the photos in anti-vaxxer groups. She privately paid for a security guard, who confiscated butterfly knives from multiple “patients” on their way into the waiting room. Dr. Kellermayr looked for help from the medical association, the police, and the Office for the Protection of the Constitution. She made her problem public.
 

Police recommend supervision

Dr. Kellermayr received emails in which the senders described in detail how they would kill her and her practice team. The physician took the threats seriously; the police did not. The officers investigated. With the evidence that the perpetrators were operating via the dark web, the officers insinuated to Dr. Kellermayr that it was not possible to find them, Klenk reported.

Dr. Kellermayr filed a complaint for the first time on Nov. 22, 2021. The law enforcement authorities in Upper Austria said they did not have domestic jurisdiction. The Austrian authorities launched another investigation. The German prosecution authorities joined the search for those posting death threats on social media. Even the Munich chief public prosecutor’s office and the Berlin public prosecutor’s office investigated the case.

According to some reports, Dr. Kellermayr did not receive police protection; a patrol was sent over from time to time. According to the police, she should “not be afraid,” and if she was, she should just call them. She was also advised to undergo supervision -- in other words, psychological treatment.

Those who had the power to help her provided no support. On the contrary, the spokesperson for the Upper Austria Police said in the Ö1 Mittagsjournal radio program that Dr. Kellermayr was “putting herself in the public eye for her own selfish benefit.” Even Peter Niedermoser, president of the Medical Association of Upper Austria, told the Austrian daily newspaper Standard, “I understand that you have to defend yourself, but it is a whole other question as to whether you have to discuss every topic to excess on Twitter. Sometimes it’s better to step away.”
 

Leaving Twitter

A German network specialist who hunts pedophiles online offered Dr. Kellermayr her help and was quickly on the trail of suspects, including a neo-Nazi from the Berlin area and a man from Upper Bavaria. Then the Office for the Protection of the Constitution stepped in. Omar Haijawi-Pirchner, head of the Austrian State Security and Intelligence Directorate, stated that the evidence provided by the network specialist would be pursued.

At the end of June, Dr. Kellermayr closed her practice. The situation was no longer tolerable for her staff, and the costs for security, €100,000 up to that point, were no longer manageable. At the start of July, she announced that she wanted to reopen the practice.

In her suicide note to the Upper Austria State Police Department, she wrote “that there was a lot of talking, but no one did anything.” In her letter to her medical association, she also made it clear that she had felt abandoned.

“Every suicide is a tragedy. This one more so: a woman in need was abandoned by the police and authorities. That is a social failure,” tweeted physicist and author Florian Aigner.

“Threatened. Ruined. Left alone by the state. Because she did her job. Because she got involved. Because she spread information. Because many want to be understanding for the self-styled ‘unconventional thinkers,’ the ‘Querdenker.’ Because many did not want to take the threat seriously. Because we tolerate them,” tweeted the intensive care physician Lämêth.

“Many colleagues using their real names get all of this outside of Twitter too: emails, phone calls, letters, or even visits by radical fanatics. If you are lucky, there is police protection, or a few reports, but often not a lot happens juridically,” tweeted Flow, anesthetist and emergency physician.

“More and more of the people who shaped Twitter by spreading reliable information voluntarily are now backing out. As long as the concept of freedom is abused here for hate and intimidation, individual responsibility can only mean self-defense. Sad,” wrote Christian Lübbers, MD, on Twitter. Since the ENT physician started vaccinating patients against COVID-19, he has been tormented with insults and death threats from anti-vaxxers and COVID deniers, this news organization has reported.

Examples of people who have backed out and deactivated their account are the virologist Isabella Eckerlek, MD, PhD, of the University of Geneva, and Natalie Grams, MD, spokesperson for the Information Network Homeopathy. For a long time, they spread information about COVID-19, corrected false assertions, and were increasingly faced with insults and hostility.

General practitioner Christian Kröner, MD, has repeatedly been the target of threats and insults and has been under police protection from time to time. He made a statement regarding Dr. Kellermayr’s death and has shut down his account for the first time following multiple instances of hostility.
 

Harassment continues

The hatred, harassment, and slander have not stopped, even after Dr. Kellermayr’s death. Harald Laatsch, who sits in the Berlin house of representatives for the Alternative for Germany party, commented that it seems “much more likely that she could no longer live with the heavy guilt of being a vaccine propagandist.”

“It is repulsive how the Querdenker deride a medical colleague who was driven to death by harassment and violence. She lost her life by saving the lives of others. Others are continuing her work. The state must protect people like her,” tweeted Karl Lauterbach, MD, PhD, who has also been overrun with hate campaigns by Querdenker and COVID deniers.

The page “Ich habe mitgemacht” – Das Archiv für Corona-Unrecht [“I Joined In” – The Archive for COVID Injustice] probably did not help to deescalate the situation on Twitter. Anonymous archivists there collect allegedly ostracizing quotes and share them, along with names. The context in which these statements were given at the time is not mentioned. Some politicians and journalists have given this online pillory the name, “We joined in! We have ostracized, defamed...”

Being humiliated and defamed is par for the course for those who spread information across social media. As doctor and politician Rainer Röver, MD, wrote, “Whoever is involved in spreading information, science, fighting against fake news, and protecting the patients, pupils, clients, or mandates entrusted to them is being shouted down, threatened in writing, or driven to suicide.” The lying, baiting mob is taking over sovereignty of the discussion. According to Röver, the politicians are doing nothing “to actually put a stop to the violent mob.”

For some time now, the Federal Criminal Police Office (BKA) of Germany has considered anti-vaxxers or COVID deniers as a “relevant risk” in connection with attacks on vaccination centers or medical practices.
 

Increasing aggression

At the start of November last year, participants at the 125th German Medical Assembly demanded that violence against health care professionals be outlawed, Mark Berger, deputy spokesperson of the German Medical Association (BÄK), recollected. At the assembly, various medical associations shared reports of an increase in aggression during the pandemic.

The State Medical Chamber of Physicians of Saxony confirmed threats of violence against physicians, death threats against employees of the Vaccination Committee of Saxony, and criminal damage to medical practices that administer vaccinations. Physicians who administer vaccines in schools receive abuse.

Owing to the increasing amount of aggression, the State Medical Association of Thuringia has set up a special email address as a first point of contact to report violence for those who are affected. “In recent months, we have received a large number of reports from physicians who have received threatening letters in relation to the COVID vaccination, or letters purporting to be liability information or notices of liability,” explained the association. In the cases of which the association becomes aware, a criminal charge is issued most of the time. The investigative proceedings are ongoing.

The State Medical Association of Hesse has devised a reporting form with which it can obtain information on the forms of violence inflicted against physicians and their teams. The reporting is anonymous, and the data are statistically analyzed.

Peter Bobbert, MD, PhD, president of the Berlin Medical Association, provided reports of threat scenarios, “the kind and frequency of which we have never experienced.” He received many messages from physicians asking for help because they had received threatening letters or because their addresses had been posted on social networks.

To date, there have only been isolated cases, said Oliver Erens, MD, spokesperson of the State Medical Association of Baden-Württemberg. “But it is true that some colleagues have already had these kinds of experiences.” Those affected have primarily reported “discussions, debates, and verbal altercations with patients on the topic of the COVID vaccination, compliance with the mask mandate, and other COVID-containment measures – definitely with a high potential for aggression from some of the patients,” said Dr. Erens. Cases of physical violence have not been reported to date.

Above all, there has been a need for advice over the phone, predominantly in the legal department of the regional medical associations. “All physicians and their teams are being recommended by their associations to consistently prosecute any cases of threat of, or use of, violence against them,” Dr. Erens said. In October 2021, the University of Heidelberg started a study on the victimization of physicians. The analysis is ongoing.
 

Staying on Twitter

Lübbers considered leaving Twitter but decided against it. “I decided not to do it and to carry on spreading information about pseudo-medicine and vaccination. I see this as necessary civic courage and will not give way to hate,” Lübbers tweeted.

As understandable as any departure is, “we must not surrender Twitter to the trolls and harassers. Who is still here? #Iamstaying,” wrote Flow. Others wrote, “I will stay on Twitter as a physician. With my real name, too. [...] We must not surrender it to the Querdenker, idiots, Nazis, and enemies of freedom.”

“We need people to share information, we need voices of reason, just as Kellermayr was. How can you say that it would be better to remain silent? Does everyone who is against idiocy, Querdenker, and conspiracy theorists now have to remain silent?” asked Janos Hegedüs, MD, in his podcast.

Hegedüs, who uncovers fake news about COVID-19 and vaccination, was and remains a frequent target of insults and threats. His attempts to take action against them has had only limited success. His conclusion is sobering. “If you decide to spread information, you should know: You are alone. You will get all of the hate and when you have a problem with it, no one will help you.”

Media attorney Chan-jo Jun, who for many years has taken a stand against hate and harassment, has deactivated his Twitter account. However, this is not a retreat, as he clarified in an interview with the German radio station Deutschlandfunk. “I do not intend to give up the fight against hate, harassment, and misinformation, but I will do it in a different place.”

He sees Dr. Kellermayr’s death as a turning point. “I thought that we had learned something after Lübcke [i.e., politician Walter Lübcke, who was murdered by a neo-Nazi]. But we are seeing that the death of a political opponent is not just the goal, but also a success for the other side. And that is shocking.”

The judicial means of taking action against hate are still not effective, said Mr. Jun. He also sees the platform operators as responsible, since they are not obliged to remove unlawful content. “German law and the German constitution hold no sway on Twitter.”
 

Right-wing extremism

What happened to Lisa-Maria Kellermayr is the same as targeted terrorism. An organized group set out to annihilate her. Social psychologist Pia Lamberty has spoken, in the context of COVID, about a pandemic of violence, the threatening nature of which has barely been recognized, both in the virtual and analog world.

In an article for the Jüdische Allgemeine, Dr. Lamberty criticizes the fact that “the mistakes made with Pegida [i.e., a far-right, Islamophobic political movement in Germany] are being made once again” in the classification of Querdenker and COVID deniers. From the very start, the protests against the COVID measures have been a rallying point in the mobilization of right-wing extremists. “The Querdenker movement is unifying radical, right-wing extremist elements. Antisemitism and racism were always welcome.” Still, the right-wing extremist motivation has not been clearly labeled as such.

The classification is not just a question of statistics. “It is also about analyzing the potential for danger and deriving political measures from this. And there is an urgent need for action here: The right-wing extremists will utilize the climate crisis, but also the war in Ukraine, attacks against refugees, and LGBTQ rights for further mobilization. Rather than the state, the focus of the attacks will be people who are labeled as the bogeyman. This also must be clearly labeled for what it is,” said Dr. Lamberty.
She wrote on Twitter, “The COVID-related attacks that took place in the last two years will not simply stop, they will shift. If we do not want more and more people to stop expressing themselves publicly, something urgently has to happen.” She added, “Once more: The next few months will be very difficult. This will probably also be accompanied by an increased level of threat for socially engaged people. More protection is urgently required.”

A version of this article first appeared on Medscape.com.

This article was translated from the Medscape German edition.

The more boosters the better? Data from Israel show that immune protection in elderly people is strengthened even further after a fourth dose. Karl Lauterbach, MD, German minister of health, recently pleaded for a second booster for those aged 18 years and older, and he pushed for a European Union–wide recommendation. He has not been able to implement this yet.

Just as before, Germany’s Standing Committee on Vaccination (STIKO) is only recommending the second booster for people aged 70 years and older, the European Medicines Agency (EMA) is recommending the fourth vaccination for everyone aged 80 years and older, and the United States has set the general age limit at 50 years.

Specialists remain skeptical about expanding the availability of the second booster. “From an immunologic perspective, people under the age of 70 with a healthy immune system do not need this fourth vaccination,” said Christiane Falk, PhD, head of the Institute for Transplantation Immunology of the Hannover Medical School (Germany) and member of the German Federal Government COVID Expert Panel, at a Science Media Center press briefing.

After the second vaccination, young healthy people are sufficiently protected against a severe course of the disease. Dr. Falk sees the STIKO recommendation as feasible, since it can be worked with. People in nursing facilities or those with additional underlying conditions would be considered for a fourth vaccination, explained Dr. Falk.
 

Complete protection unrealistic

Achieving complete protection against infection through multiple boosters is not realistic, said Christoph Neumann-Haefelin, MD, head of the Working Group for Translational Virus Immunology at the Clinic for Internal Medicine II, University Hospital Freiburg, Germany. Therefore, this should not be pursued when discussing boosters. “The aim of the booster vaccination should be to protect different groups of people against severe courses of the disease,” said Dr. Neumann-Haefelin.

Neutralizing antibodies that are only present in high concentrations for a few weeks after infection or vaccination are sometimes able to prevent the infection on their own. The immunologic memory of B cells and T cells, which ensures long-lasting protection against severe courses of the disease, is at a high level after two doses, and a third dose increases the protection more.

While people with a weak immune system need significantly more vaccinations in a shorter period to receive the same protection, too many booster vaccinations against SARS-CoV-2 are not sensible for young healthy people.
 

Immune saturation effect

A recent study in macaques showed that an adjusted Omicron booster did not lead to higher antibody titers, compared with a usual booster. In January 2022, the EMA warned against frequent consecutive boosters that may no longer produce the desired immune response.

If someone receives a booster too early, a saturation effect can occur, warned Andreas Radbruch, PhD, scientific director of the German Rheumatism Research Center Berlin. “We know this from lots of experimental studies but also from lots of other vaccinations. For example, you cannot be vaccinated against tetanus twice at 3- or 4-week intervals. Nothing at all will happen the second time,” explained Dr. Radbruch.

If the same antigen is applied again and again at the same dose, the immune system is made so active that the antigen is directly intercepted and cannot have any new effect on the immune system. This mechanism has been known for a long time, said Dr. Radbruch.
 

‘Original antigenic sin’

Premature boosting could even be a handicap in the competition between immune response and virus, said Dr. Radbruch. This is due to the principle of “original antigenic sin.” If the immune system has already come into contact with a virus, contact with a new virus variant will cause it to form antibodies predominantly against those epitopes that were already present in the original virus. As a result of this, too many boosters can weaken protection against different variants.

“We have not actually observed this with SARS-CoV-2, however,” said Dr. Radbruch. “Immunity is always extremely broad. With a double or triple vaccination, all previously existing variants are covered by an affinity-matured immune system.”

Dr. Neumann-Haefelin confirmed this and added that all virus mutations, including Omicron, have different epitopes that affect the antibody response, but the T-cell response does not differ.

Dr. Radbruch said that the vaccine protection probably lasts for decades. Following an infection or vaccination, the antibody concentration in the bone marrow is similar to that achieved after a measles or tetanus vaccination. “The vaccination is already extremely efficient. You have protection at the same magnitude as for other infectious diseases or vaccinations, which is expected to last decades,” said Dr. Radbruch.

He clarified that the decrease in antibodies after vaccination and infection is normal and does not indicate a drop in protection. “Quantity and quality must not be confused here. There is simply less mass, but the grade of remaining antibody increases.”

In the competition around the virus antigens (referred to as affinity maturation), antibodies develop that bind 10 to 100 times better and are particularly protective against the virus. The immune system is thereby sustainably effective.
 

For whom and when?

Since the immune response is age dependent, it makes more sense to administer an additional booster to elderly people than to young people. Also included in this group, however, are people whose immune system still does not provide the same level of protection after the second or even third vaccination as that of younger, healthy people.

Dr. Radbruch noted that 4% of people older than 70 years exhibited autoantibodies against interferons. The effects are huge. “That is 20% of patients in an intensive care unit – and they all have a very poor prognosis,” said Dr. Radbruch. These people are extremely threatened by the virus. Multiple vaccinations are sensible for them.

Even people with a weak immune response benefit from multiple vaccinations, confirmed Dr. Neumann-Haefelin. “We are not seeing the antibody responses here that we see in young people with healthy immune systems until the third or fourth vaccination sometimes.”

Although for young healthy people, it is particularly important to ensure a sufficient period between vaccinations so that the affinity maturation is not impaired, those with a weak immune response can be vaccinated again as soon as after 3 months.

The “optimum minimum period of time” for people with healthy immune systems is 6 months, according to Dr. Neumann-Haefelin. “This is true for everyone in whom a proper response is expected.” The vaccine protection probably lasts significantly longer, and therefore, frequent boosting may not be necessary in the future, he said. The time separation also applies for medical personnel, for whom the Robert Koch Institute also recommends a second booster.

A version of this article first appeared on Medscape.com.

The more boosters the better? Data from Israel show that immune protection in elderly people is strengthened even further after a fourth dose. Karl Lauterbach, MD, German minister of health, recently pleaded for a second booster for those aged 18 years and older, and he pushed for a European Union–wide recommendation. He has not been able to implement this yet.

Just as before, Germany’s Standing Committee on Vaccination (STIKO) is only recommending the second booster for people aged 70 years and older, the European Medicines Agency (EMA) is recommending the fourth vaccination for everyone aged 80 years and older, and the United States has set the general age limit at 50 years.

Specialists remain skeptical about expanding the availability of the second booster. “From an immunologic perspective, people under the age of 70 with a healthy immune system do not need this fourth vaccination,” said Christiane Falk, PhD, head of the Institute for Transplantation Immunology of the Hannover Medical School (Germany) and member of the German Federal Government COVID Expert Panel, at a Science Media Center press briefing.

After the second vaccination, young healthy people are sufficiently protected against a severe course of the disease. Dr. Falk sees the STIKO recommendation as feasible, since it can be worked with. People in nursing facilities or those with additional underlying conditions would be considered for a fourth vaccination, explained Dr. Falk.
 

Complete protection unrealistic

Achieving complete protection against infection through multiple boosters is not realistic, said Christoph Neumann-Haefelin, MD, head of the Working Group for Translational Virus Immunology at the Clinic for Internal Medicine II, University Hospital Freiburg, Germany. Therefore, this should not be pursued when discussing boosters. “The aim of the booster vaccination should be to protect different groups of people against severe courses of the disease,” said Dr. Neumann-Haefelin.

Neutralizing antibodies that are only present in high concentrations for a few weeks after infection or vaccination are sometimes able to prevent the infection on their own. The immunologic memory of B cells and T cells, which ensures long-lasting protection against severe courses of the disease, is at a high level after two doses, and a third dose increases the protection more.

While people with a weak immune system need significantly more vaccinations in a shorter period to receive the same protection, too many booster vaccinations against SARS-CoV-2 are not sensible for young healthy people.
 

Immune saturation effect

A recent study in macaques showed that an adjusted Omicron booster did not lead to higher antibody titers, compared with a usual booster. In January 2022, the EMA warned against frequent consecutive boosters that may no longer produce the desired immune response.

If someone receives a booster too early, a saturation effect can occur, warned Andreas Radbruch, PhD, scientific director of the German Rheumatism Research Center Berlin. “We know this from lots of experimental studies but also from lots of other vaccinations. For example, you cannot be vaccinated against tetanus twice at 3- or 4-week intervals. Nothing at all will happen the second time,” explained Dr. Radbruch.

If the same antigen is applied again and again at the same dose, the immune system is made so active that the antigen is directly intercepted and cannot have any new effect on the immune system. This mechanism has been known for a long time, said Dr. Radbruch.
 

‘Original antigenic sin’

Premature boosting could even be a handicap in the competition between immune response and virus, said Dr. Radbruch. This is due to the principle of “original antigenic sin.” If the immune system has already come into contact with a virus, contact with a new virus variant will cause it to form antibodies predominantly against those epitopes that were already present in the original virus. As a result of this, too many boosters can weaken protection against different variants.

“We have not actually observed this with SARS-CoV-2, however,” said Dr. Radbruch. “Immunity is always extremely broad. With a double or triple vaccination, all previously existing variants are covered by an affinity-matured immune system.”

Dr. Neumann-Haefelin confirmed this and added that all virus mutations, including Omicron, have different epitopes that affect the antibody response, but the T-cell response does not differ.

Dr. Radbruch said that the vaccine protection probably lasts for decades. Following an infection or vaccination, the antibody concentration in the bone marrow is similar to that achieved after a measles or tetanus vaccination. “The vaccination is already extremely efficient. You have protection at the same magnitude as for other infectious diseases or vaccinations, which is expected to last decades,” said Dr. Radbruch.

He clarified that the decrease in antibodies after vaccination and infection is normal and does not indicate a drop in protection. “Quantity and quality must not be confused here. There is simply less mass, but the grade of remaining antibody increases.”

In the competition around the virus antigens (referred to as affinity maturation), antibodies develop that bind 10 to 100 times better and are particularly protective against the virus. The immune system is thereby sustainably effective.
 

For whom and when?

Since the immune response is age dependent, it makes more sense to administer an additional booster to elderly people than to young people. Also included in this group, however, are people whose immune system still does not provide the same level of protection after the second or even third vaccination as that of younger, healthy people.

Dr. Radbruch noted that 4% of people older than 70 years exhibited autoantibodies against interferons. The effects are huge. “That is 20% of patients in an intensive care unit – and they all have a very poor prognosis,” said Dr. Radbruch. These people are extremely threatened by the virus. Multiple vaccinations are sensible for them.

Even people with a weak immune response benefit from multiple vaccinations, confirmed Dr. Neumann-Haefelin. “We are not seeing the antibody responses here that we see in young people with healthy immune systems until the third or fourth vaccination sometimes.”

Although for young healthy people, it is particularly important to ensure a sufficient period between vaccinations so that the affinity maturation is not impaired, those with a weak immune response can be vaccinated again as soon as after 3 months.

The “optimum minimum period of time” for people with healthy immune systems is 6 months, according to Dr. Neumann-Haefelin. “This is true for everyone in whom a proper response is expected.” The vaccine protection probably lasts significantly longer, and therefore, frequent boosting may not be necessary in the future, he said. The time separation also applies for medical personnel, for whom the Robert Koch Institute also recommends a second booster.

A version of this article first appeared on Medscape.com.

The more boosters the better? Data from Israel show that immune protection in elderly people is strengthened even further after a fourth dose. Karl Lauterbach, MD, German minister of health, recently pleaded for a second booster for those aged 18 years and older, and he pushed for a European Union–wide recommendation. He has not been able to implement this yet.

Just as before, Germany’s Standing Committee on Vaccination (STIKO) is only recommending the second booster for people aged 70 years and older, the European Medicines Agency (EMA) is recommending the fourth vaccination for everyone aged 80 years and older, and the United States has set the general age limit at 50 years.

Specialists remain skeptical about expanding the availability of the second booster. “From an immunologic perspective, people under the age of 70 with a healthy immune system do not need this fourth vaccination,” said Christiane Falk, PhD, head of the Institute for Transplantation Immunology of the Hannover Medical School (Germany) and member of the German Federal Government COVID Expert Panel, at a Science Media Center press briefing.

After the second vaccination, young healthy people are sufficiently protected against a severe course of the disease. Dr. Falk sees the STIKO recommendation as feasible, since it can be worked with. People in nursing facilities or those with additional underlying conditions would be considered for a fourth vaccination, explained Dr. Falk.
 

Complete protection unrealistic

Achieving complete protection against infection through multiple boosters is not realistic, said Christoph Neumann-Haefelin, MD, head of the Working Group for Translational Virus Immunology at the Clinic for Internal Medicine II, University Hospital Freiburg, Germany. Therefore, this should not be pursued when discussing boosters. “The aim of the booster vaccination should be to protect different groups of people against severe courses of the disease,” said Dr. Neumann-Haefelin.

Neutralizing antibodies that are only present in high concentrations for a few weeks after infection or vaccination are sometimes able to prevent the infection on their own. The immunologic memory of B cells and T cells, which ensures long-lasting protection against severe courses of the disease, is at a high level after two doses, and a third dose increases the protection more.

While people with a weak immune system need significantly more vaccinations in a shorter period to receive the same protection, too many booster vaccinations against SARS-CoV-2 are not sensible for young healthy people.
 

Immune saturation effect

A recent study in macaques showed that an adjusted Omicron booster did not lead to higher antibody titers, compared with a usual booster. In January 2022, the EMA warned against frequent consecutive boosters that may no longer produce the desired immune response.

If someone receives a booster too early, a saturation effect can occur, warned Andreas Radbruch, PhD, scientific director of the German Rheumatism Research Center Berlin. “We know this from lots of experimental studies but also from lots of other vaccinations. For example, you cannot be vaccinated against tetanus twice at 3- or 4-week intervals. Nothing at all will happen the second time,” explained Dr. Radbruch.

If the same antigen is applied again and again at the same dose, the immune system is made so active that the antigen is directly intercepted and cannot have any new effect on the immune system. This mechanism has been known for a long time, said Dr. Radbruch.
 

‘Original antigenic sin’

Premature boosting could even be a handicap in the competition between immune response and virus, said Dr. Radbruch. This is due to the principle of “original antigenic sin.” If the immune system has already come into contact with a virus, contact with a new virus variant will cause it to form antibodies predominantly against those epitopes that were already present in the original virus. As a result of this, too many boosters can weaken protection against different variants.

“We have not actually observed this with SARS-CoV-2, however,” said Dr. Radbruch. “Immunity is always extremely broad. With a double or triple vaccination, all previously existing variants are covered by an affinity-matured immune system.”

Dr. Neumann-Haefelin confirmed this and added that all virus mutations, including Omicron, have different epitopes that affect the antibody response, but the T-cell response does not differ.

Dr. Radbruch said that the vaccine protection probably lasts for decades. Following an infection or vaccination, the antibody concentration in the bone marrow is similar to that achieved after a measles or tetanus vaccination. “The vaccination is already extremely efficient. You have protection at the same magnitude as for other infectious diseases or vaccinations, which is expected to last decades,” said Dr. Radbruch.

He clarified that the decrease in antibodies after vaccination and infection is normal and does not indicate a drop in protection. “Quantity and quality must not be confused here. There is simply less mass, but the grade of remaining antibody increases.”

In the competition around the virus antigens (referred to as affinity maturation), antibodies develop that bind 10 to 100 times better and are particularly protective against the virus. The immune system is thereby sustainably effective.
 

For whom and when?

Since the immune response is age dependent, it makes more sense to administer an additional booster to elderly people than to young people. Also included in this group, however, are people whose immune system still does not provide the same level of protection after the second or even third vaccination as that of younger, healthy people.

Dr. Radbruch noted that 4% of people older than 70 years exhibited autoantibodies against interferons. The effects are huge. “That is 20% of patients in an intensive care unit – and they all have a very poor prognosis,” said Dr. Radbruch. These people are extremely threatened by the virus. Multiple vaccinations are sensible for them.

Even people with a weak immune response benefit from multiple vaccinations, confirmed Dr. Neumann-Haefelin. “We are not seeing the antibody responses here that we see in young people with healthy immune systems until the third or fourth vaccination sometimes.”

Although for young healthy people, it is particularly important to ensure a sufficient period between vaccinations so that the affinity maturation is not impaired, those with a weak immune response can be vaccinated again as soon as after 3 months.

The “optimum minimum period of time” for people with healthy immune systems is 6 months, according to Dr. Neumann-Haefelin. “This is true for everyone in whom a proper response is expected.” The vaccine protection probably lasts significantly longer, and therefore, frequent boosting may not be necessary in the future, he said. The time separation also applies for medical personnel, for whom the Robert Koch Institute also recommends a second booster.

A version of this article first appeared on Medscape.com.