Influenza

The patients walk into Dr. Melissa Marshall’s community clinics in Northern California with the telltale symptoms. They’re having trouble breathing. It may even hurt to inhale. They’ve got a cough, and the sore throat is definitely there.

A straight case of COVID-19? Not so fast. This is wildfire country.

Up and down the West Coast, hospitals and health facilities are reporting an influx of patients with problems most likely related to smoke inhalation. As fires rage largely uncontrolled amid dry heat and high winds, smoke and ash are billowing and settling on coastal areas like San Francisco and cities and towns hundreds of miles inland as well, turning the sky orange or gray and making even ordinary breathing difficult.

But that, Marshall said, is only part of the challenge. Facilities already strapped for testing supplies and personal protective equipment must first rule out COVID-19 in these patients, because many of the symptoms they present with are the same as those caused by the virus.

“Obviously, there’s overlap in the symptoms,” said Marshall, the CEO of CommuniCare, a collection of six clinics in Yolo County, near Sacramento, that treats mostly underinsured and uninsured patients. “Any time someone comes in with even some of those symptoms, we ask ourselves, ‘Is it COVID?’ At the end of the day, clinically speaking, I still want to rule out the virus.”

The protocol is to treat the symptoms, whatever their cause, while recommending that the patient quarantine until test results for the virus come back, she said.

It is a scene playing out in numerous hospitals. Administrators and physicians, finely attuned to COVID-19’s ability to spread quickly and wreak havoc, simply won’t take a chance when they recognize symptoms that could emanate from the virus.

“We’ve seen an increase in patients presenting to the emergency department with respiratory distress,” said Dr. Nanette Mickiewicz, president and CEO of Dominican Hospital in Santa Cruz. “As this can also be a symptom of COVID-19, we’re treating these patients as we would any person under investigation for coronavirus until we can rule them out through our screening process.” During the workup, symptoms that are more specific to COVID-19, like fever, would become apparent.

For the workers at Dominican, the issue moved to the top of the list quickly. Santa Cruz and San Mateo counties have borne the brunt of the CZU Lightning Complex fires, which as of Sept. 10 had burned more than 86,000 acres, destroying 1,100 structures and threatening more than 7,600 others. Nearly a month after they began, the fires were approximately 84% contained, but thousands of people remained evacuated.

Dominican, a Dignity Health hospital, is “open, safe and providing care,” Mickiewicz said. Multiple tents erected outside the building serve as an extension of its ER waiting room. They also are used to perform what has come to be understood as an essential role: separating those with symptoms of COVID-19 from those without.

At the two Solano County hospitals operated by NorthBay Healthcare, the path of some of the wildfires prompted officials to review their evacuation procedures, said spokesperson Steve Huddleston. They ultimately avoided the need to evacuate patients, and new ones arrived with COVID-like symptoms that may actually have been from smoke inhalation.

Huddleston said NorthBay’s intake process “calls for anyone with COVID characteristics to be handled as [a] patient under investigation for COVID, which means they’re separated, screened and managed by staff in special PPE.” At the two hospitals, which have handled nearly 200 COVID cases so far, the protocol is well established.

Hospitals in California, though not under siege in most cases, are dealing with multiple issues they might typically face only sporadically. In Napa County, Adventist Health St. Helena Hospital evacuated 51 patients on a single August night as a fire approached, moving them to 10 other facilities according to their needs and bed space. After a 10-day closure, the hospital was allowed to reopen as evacuation orders were lifted, the fire having been contained some distance away.

The wildfires are also taking a personal toll on health care workers. CommuniCare’s Marshall lost her family’s home in rural Winters, along with 20 acres of olive trees and other plantings that surrounded it, in the Aug. 19 fires that swept through Solano County.

“They called it a ‘firenado,’ ” Marshall said. An apparent confluence of three fires raged out of control, demolishing thousands of acres. With her family safely accounted for and temporary housing arranged by a friend, she returned to work. “Our clinics interact with a very vulnerable population,” she said, “and this is a critical time for them.”

While she pondered how her family would rebuild, the CEO was faced with another immediate crisis: the clinic’s shortage of supplies. Last month, CommuniCare got down to 19 COVID test kits on hand, and ran so low on swabs “that we were literally turning to our veterinary friends for reinforcements,” the doctor said. The clinic’s COVID test results, meanwhile, were taking nearly two weeks to be returned from an overwhelmed outside lab, rendering contact tracing almost useless.

Those situations have been addressed, at least temporarily, Marshall said. But although the West Coast is in the most dangerous time of year for wildfires, generally September to December, another complication for health providers lies on the horizon: flu season.

The Southern Hemisphere, whose influenza trends during our summer months typically predict what’s to come for the U.S., has had very little of the disease this year, presumably because of restricted travel, social distancing and face masks. But it’s too early to be sure what the U.S. flu season will entail.

“You can start to see some cases of the flu in late October,” said Marshall, “and the reality is that it’s going to carry a number of characteristics that could also be symptomatic of COVID. And nothing changes: You have to rule it out, just to eliminate the risk.”

KHN (Kaiser Health News) is a nonprofit news service covering health issues. It is an editorially independent program of KFF (Kaiser Family Foundation), which is not affiliated with Kaiser Permanente. This KHN story first published on California Healthline, a service of the California Health Care Foundation.

The patients walk into Dr. Melissa Marshall’s community clinics in Northern California with the telltale symptoms. They’re having trouble breathing. It may even hurt to inhale. They’ve got a cough, and the sore throat is definitely there.

A straight case of COVID-19? Not so fast. This is wildfire country.

Up and down the West Coast, hospitals and health facilities are reporting an influx of patients with problems most likely related to smoke inhalation. As fires rage largely uncontrolled amid dry heat and high winds, smoke and ash are billowing and settling on coastal areas like San Francisco and cities and towns hundreds of miles inland as well, turning the sky orange or gray and making even ordinary breathing difficult.

But that, Marshall said, is only part of the challenge. Facilities already strapped for testing supplies and personal protective equipment must first rule out COVID-19 in these patients, because many of the symptoms they present with are the same as those caused by the virus.

“Obviously, there’s overlap in the symptoms,” said Marshall, the CEO of CommuniCare, a collection of six clinics in Yolo County, near Sacramento, that treats mostly underinsured and uninsured patients. “Any time someone comes in with even some of those symptoms, we ask ourselves, ‘Is it COVID?’ At the end of the day, clinically speaking, I still want to rule out the virus.”

The protocol is to treat the symptoms, whatever their cause, while recommending that the patient quarantine until test results for the virus come back, she said.

It is a scene playing out in numerous hospitals. Administrators and physicians, finely attuned to COVID-19’s ability to spread quickly and wreak havoc, simply won’t take a chance when they recognize symptoms that could emanate from the virus.

“We’ve seen an increase in patients presenting to the emergency department with respiratory distress,” said Dr. Nanette Mickiewicz, president and CEO of Dominican Hospital in Santa Cruz. “As this can also be a symptom of COVID-19, we’re treating these patients as we would any person under investigation for coronavirus until we can rule them out through our screening process.” During the workup, symptoms that are more specific to COVID-19, like fever, would become apparent.

For the workers at Dominican, the issue moved to the top of the list quickly. Santa Cruz and San Mateo counties have borne the brunt of the CZU Lightning Complex fires, which as of Sept. 10 had burned more than 86,000 acres, destroying 1,100 structures and threatening more than 7,600 others. Nearly a month after they began, the fires were approximately 84% contained, but thousands of people remained evacuated.

Dominican, a Dignity Health hospital, is “open, safe and providing care,” Mickiewicz said. Multiple tents erected outside the building serve as an extension of its ER waiting room. They also are used to perform what has come to be understood as an essential role: separating those with symptoms of COVID-19 from those without.

At the two Solano County hospitals operated by NorthBay Healthcare, the path of some of the wildfires prompted officials to review their evacuation procedures, said spokesperson Steve Huddleston. They ultimately avoided the need to evacuate patients, and new ones arrived with COVID-like symptoms that may actually have been from smoke inhalation.

Huddleston said NorthBay’s intake process “calls for anyone with COVID characteristics to be handled as [a] patient under investigation for COVID, which means they’re separated, screened and managed by staff in special PPE.” At the two hospitals, which have handled nearly 200 COVID cases so far, the protocol is well established.

Hospitals in California, though not under siege in most cases, are dealing with multiple issues they might typically face only sporadically. In Napa County, Adventist Health St. Helena Hospital evacuated 51 patients on a single August night as a fire approached, moving them to 10 other facilities according to their needs and bed space. After a 10-day closure, the hospital was allowed to reopen as evacuation orders were lifted, the fire having been contained some distance away.

The wildfires are also taking a personal toll on health care workers. CommuniCare’s Marshall lost her family’s home in rural Winters, along with 20 acres of olive trees and other plantings that surrounded it, in the Aug. 19 fires that swept through Solano County.

“They called it a ‘firenado,’ ” Marshall said. An apparent confluence of three fires raged out of control, demolishing thousands of acres. With her family safely accounted for and temporary housing arranged by a friend, she returned to work. “Our clinics interact with a very vulnerable population,” she said, “and this is a critical time for them.”

While she pondered how her family would rebuild, the CEO was faced with another immediate crisis: the clinic’s shortage of supplies. Last month, CommuniCare got down to 19 COVID test kits on hand, and ran so low on swabs “that we were literally turning to our veterinary friends for reinforcements,” the doctor said. The clinic’s COVID test results, meanwhile, were taking nearly two weeks to be returned from an overwhelmed outside lab, rendering contact tracing almost useless.

Those situations have been addressed, at least temporarily, Marshall said. But although the West Coast is in the most dangerous time of year for wildfires, generally September to December, another complication for health providers lies on the horizon: flu season.

The Southern Hemisphere, whose influenza trends during our summer months typically predict what’s to come for the U.S., has had very little of the disease this year, presumably because of restricted travel, social distancing and face masks. But it’s too early to be sure what the U.S. flu season will entail.

“You can start to see some cases of the flu in late October,” said Marshall, “and the reality is that it’s going to carry a number of characteristics that could also be symptomatic of COVID. And nothing changes: You have to rule it out, just to eliminate the risk.”

KHN (Kaiser Health News) is a nonprofit news service covering health issues. It is an editorially independent program of KFF (Kaiser Family Foundation), which is not affiliated with Kaiser Permanente. This KHN story first published on California Healthline, a service of the California Health Care Foundation.

The patients walk into Dr. Melissa Marshall’s community clinics in Northern California with the telltale symptoms. They’re having trouble breathing. It may even hurt to inhale. They’ve got a cough, and the sore throat is definitely there.

A straight case of COVID-19? Not so fast. This is wildfire country.

Up and down the West Coast, hospitals and health facilities are reporting an influx of patients with problems most likely related to smoke inhalation. As fires rage largely uncontrolled amid dry heat and high winds, smoke and ash are billowing and settling on coastal areas like San Francisco and cities and towns hundreds of miles inland as well, turning the sky orange or gray and making even ordinary breathing difficult.

But that, Marshall said, is only part of the challenge. Facilities already strapped for testing supplies and personal protective equipment must first rule out COVID-19 in these patients, because many of the symptoms they present with are the same as those caused by the virus.

“Obviously, there’s overlap in the symptoms,” said Marshall, the CEO of CommuniCare, a collection of six clinics in Yolo County, near Sacramento, that treats mostly underinsured and uninsured patients. “Any time someone comes in with even some of those symptoms, we ask ourselves, ‘Is it COVID?’ At the end of the day, clinically speaking, I still want to rule out the virus.”

The protocol is to treat the symptoms, whatever their cause, while recommending that the patient quarantine until test results for the virus come back, she said.

It is a scene playing out in numerous hospitals. Administrators and physicians, finely attuned to COVID-19’s ability to spread quickly and wreak havoc, simply won’t take a chance when they recognize symptoms that could emanate from the virus.

“We’ve seen an increase in patients presenting to the emergency department with respiratory distress,” said Dr. Nanette Mickiewicz, president and CEO of Dominican Hospital in Santa Cruz. “As this can also be a symptom of COVID-19, we’re treating these patients as we would any person under investigation for coronavirus until we can rule them out through our screening process.” During the workup, symptoms that are more specific to COVID-19, like fever, would become apparent.

For the workers at Dominican, the issue moved to the top of the list quickly. Santa Cruz and San Mateo counties have borne the brunt of the CZU Lightning Complex fires, which as of Sept. 10 had burned more than 86,000 acres, destroying 1,100 structures and threatening more than 7,600 others. Nearly a month after they began, the fires were approximately 84% contained, but thousands of people remained evacuated.

Dominican, a Dignity Health hospital, is “open, safe and providing care,” Mickiewicz said. Multiple tents erected outside the building serve as an extension of its ER waiting room. They also are used to perform what has come to be understood as an essential role: separating those with symptoms of COVID-19 from those without.

At the two Solano County hospitals operated by NorthBay Healthcare, the path of some of the wildfires prompted officials to review their evacuation procedures, said spokesperson Steve Huddleston. They ultimately avoided the need to evacuate patients, and new ones arrived with COVID-like symptoms that may actually have been from smoke inhalation.

Huddleston said NorthBay’s intake process “calls for anyone with COVID characteristics to be handled as [a] patient under investigation for COVID, which means they’re separated, screened and managed by staff in special PPE.” At the two hospitals, which have handled nearly 200 COVID cases so far, the protocol is well established.

Hospitals in California, though not under siege in most cases, are dealing with multiple issues they might typically face only sporadically. In Napa County, Adventist Health St. Helena Hospital evacuated 51 patients on a single August night as a fire approached, moving them to 10 other facilities according to their needs and bed space. After a 10-day closure, the hospital was allowed to reopen as evacuation orders were lifted, the fire having been contained some distance away.

The wildfires are also taking a personal toll on health care workers. CommuniCare’s Marshall lost her family’s home in rural Winters, along with 20 acres of olive trees and other plantings that surrounded it, in the Aug. 19 fires that swept through Solano County.

“They called it a ‘firenado,’ ” Marshall said. An apparent confluence of three fires raged out of control, demolishing thousands of acres. With her family safely accounted for and temporary housing arranged by a friend, she returned to work. “Our clinics interact with a very vulnerable population,” she said, “and this is a critical time for them.”

While she pondered how her family would rebuild, the CEO was faced with another immediate crisis: the clinic’s shortage of supplies. Last month, CommuniCare got down to 19 COVID test kits on hand, and ran so low on swabs “that we were literally turning to our veterinary friends for reinforcements,” the doctor said. The clinic’s COVID test results, meanwhile, were taking nearly two weeks to be returned from an overwhelmed outside lab, rendering contact tracing almost useless.

Those situations have been addressed, at least temporarily, Marshall said. But although the West Coast is in the most dangerous time of year for wildfires, generally September to December, another complication for health providers lies on the horizon: flu season.

The Southern Hemisphere, whose influenza trends during our summer months typically predict what’s to come for the U.S., has had very little of the disease this year, presumably because of restricted travel, social distancing and face masks. But it’s too early to be sure what the U.S. flu season will entail.

“You can start to see some cases of the flu in late October,” said Marshall, “and the reality is that it’s going to carry a number of characteristics that could also be symptomatic of COVID. And nothing changes: You have to rule it out, just to eliminate the risk.”

KHN (Kaiser Health News) is a nonprofit news service covering health issues. It is an editorially independent program of KFF (Kaiser Family Foundation), which is not affiliated with Kaiser Permanente. This KHN story first published on California Healthline, a service of the California Health Care Foundation.

Vaccinations against influenza and pneumonia may help protect against Alzheimer’s disease,  two large observational studies suggest.

In a cohort study of more than 9,000 older adults, receiving a single influenza vaccination was associated with a 17% lower prevalence of Alzheimer’s disease compared with not receiving the vaccine. In addition, for those who were vaccinated more than once over the years, there was an additional 13% reduction in Alzheimer’s disease incidence.

In another study, which included more than 5,000 older participants, being vaccinated against pneumonia between the ages of 65 and 75 reduced the risk of developing Alzheimer’s disease by 30%.

The subject of vaccines “is obviously very topical with the COVID-19 pandemic,” said Rebecca M. Edelmayer, PhD, director of scientific engagement for the Alzheimer’s Association. “While these are very preliminary data, these studies do suggest that with vaccination against both respiratory illnesses, there is the potential to lower risk for developing cognitive decline and dementia,” said Dr. Edelmayer, who was not involved in the research.

The findings of both studies were presented at the virtual annual meeting of the Alzheimer’s Association International Conference.

Lower Alzheimer’s disease prevalence

The influenza vaccine study was presented by Albert Amran, a fourth-year medical student at McGovern Medical School at the University of Texas Health Science Center at Houston. The researchers used electronic health record data to create a propensity-matched cohort of 9,066 vaccinated and unvaccinated adults ages 60 and older.

Influenza vaccination, increased frequency of administration, and younger age at time of vaccination were all associated with reduced incidence of Alzheimer’s disease, Mr. Amran reported.

Being vaccinated for influenza was significantly linked to a lower prevalence of Alzheimer’s disease (odds ratio [OR], 0.83; P < .0001) in comparison with not being vaccinated. Receiving more than one vaccination over the years was associated with an additional reduction in AD incidence (OR, 0.87; P = .0342). The protection appeared to be strongest for those who received their first vaccination at a younger age, for example, at age 60 versus 70.

Mr. Amran and research colleagues have two theories as to why influenza vaccination may protect the brain.

One is that vaccination may aid the immune system as people age. “As people get older, their immune systems become less able to control infection. We’ve seen this with the ongoing pandemic, with older people at much higher risk for dying. Giving people the vaccine once a year may help keep the immune system in shape,” Mr. Amran said.

Another theory is that the prevention of influenza itself may be relevant. “Flu infections can be extremely deadly in older patients. Maybe the results of our study will give another reason for people to get vaccinated,” Mr. Amran said.

Pneumonia vaccine

The other study was presented by Svetlana Ukraintseva, PhD, of Duke University, Durham, N.C.

Dr. Ukraintseva and colleagues investigated associations between pneumococcal vaccine, with and without an accompanying influenza vaccine, and the risk for Alzheimer’s disease among 5,146 participants in the Cardiovascular Health Study. Covariates included sex, race, birth cohort, education, smoking, and a known genetic risk factor for Alzheimer’s disease: the rs2075650 G allele in the TOMM40 gene.

In a logistic model with all covariates, vaccination against pneumonia between ages 65 and 75 was significantly associated with reduced risk of developing AD (OR, 0.70; P < .04). The largest reduction in Alzheimer’s disease risk (OR, 0.62; P < .04) was among those vaccinated against pneumonia who were noncarriers of the rs2075650 G allele.

Total number of vaccinations against pneumonia and influenza between ages 65 and 75 was also associated with a lower risk for Alzheimer’s disease (OR, 0.88; P < .01). However, the effect was not evident for the influenza vaccination alone.

“The fact that very different pathogens – viral, bacterial, fungal – have been linked to Alzheimer’s disease indicates a possibility that compromised host immunity may play a role in Alzheimer’s disease through increasing overall brain’s vulnerability to various microbes,” said Dr. Ukraintseva.

The current findings support further investigation of pneumococcal vaccine as a “reasonable candidate for repurposing in personalized AD prevention,” she noted. “These results also support the important role of boosting overall immune robustness/resilience in preventing Alzheimer’s disease,” Dr. Ukraintseva added.

Her group is currently working on confirming the findings in another population.

Brain protective?

“Neither study can prove that the benefit is directly related to the vaccine itself, but what they can indicate is that potentially, vaccines are a way to protect your health and brain,” Dr. Edelmayer said.

In a statement, Maria Carrillo, PhD, chief science officer for the Alzheimer’s Association, noted that more research is needed.

The new data call “for further studies in large, diverse clinical trials to inform whether vaccinations as a public health strategy decrease our risk for developing dementia as we age,” Dr. Carillo said.

Funding for the influenza vaccine study was provided by the Christopher Sarofim Family Professorship in Biomedical Informatics and Bioengineering, a UT STARs Award, the Cancer Prevention and Research Institute of Texas, and the National Institutes of Health. Funding for the pneumonia study was provided by the National Institute on Aging. Dr. Amran, Dr. Ukraintseva, Dr. Edelmayer, and Dr. Carrillo have reported no relevant financial relationships.
 

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

Vaccinations against influenza and pneumonia may help protect against Alzheimer’s disease,  two large observational studies suggest.

In a cohort study of more than 9,000 older adults, receiving a single influenza vaccination was associated with a 17% lower prevalence of Alzheimer’s disease compared with not receiving the vaccine. In addition, for those who were vaccinated more than once over the years, there was an additional 13% reduction in Alzheimer’s disease incidence.

In another study, which included more than 5,000 older participants, being vaccinated against pneumonia between the ages of 65 and 75 reduced the risk of developing Alzheimer’s disease by 30%.

The subject of vaccines “is obviously very topical with the COVID-19 pandemic,” said Rebecca M. Edelmayer, PhD, director of scientific engagement for the Alzheimer’s Association. “While these are very preliminary data, these studies do suggest that with vaccination against both respiratory illnesses, there is the potential to lower risk for developing cognitive decline and dementia,” said Dr. Edelmayer, who was not involved in the research.

The findings of both studies were presented at the virtual annual meeting of the Alzheimer’s Association International Conference.

Lower Alzheimer’s disease prevalence

The influenza vaccine study was presented by Albert Amran, a fourth-year medical student at McGovern Medical School at the University of Texas Health Science Center at Houston. The researchers used electronic health record data to create a propensity-matched cohort of 9,066 vaccinated and unvaccinated adults ages 60 and older.

Influenza vaccination, increased frequency of administration, and younger age at time of vaccination were all associated with reduced incidence of Alzheimer’s disease, Mr. Amran reported.

Being vaccinated for influenza was significantly linked to a lower prevalence of Alzheimer’s disease (odds ratio [OR], 0.83; P < .0001) in comparison with not being vaccinated. Receiving more than one vaccination over the years was associated with an additional reduction in AD incidence (OR, 0.87; P = .0342). The protection appeared to be strongest for those who received their first vaccination at a younger age, for example, at age 60 versus 70.

Mr. Amran and research colleagues have two theories as to why influenza vaccination may protect the brain.

One is that vaccination may aid the immune system as people age. “As people get older, their immune systems become less able to control infection. We’ve seen this with the ongoing pandemic, with older people at much higher risk for dying. Giving people the vaccine once a year may help keep the immune system in shape,” Mr. Amran said.

Another theory is that the prevention of influenza itself may be relevant. “Flu infections can be extremely deadly in older patients. Maybe the results of our study will give another reason for people to get vaccinated,” Mr. Amran said.

Pneumonia vaccine

The other study was presented by Svetlana Ukraintseva, PhD, of Duke University, Durham, N.C.

Dr. Ukraintseva and colleagues investigated associations between pneumococcal vaccine, with and without an accompanying influenza vaccine, and the risk for Alzheimer’s disease among 5,146 participants in the Cardiovascular Health Study. Covariates included sex, race, birth cohort, education, smoking, and a known genetic risk factor for Alzheimer’s disease: the rs2075650 G allele in the TOMM40 gene.

In a logistic model with all covariates, vaccination against pneumonia between ages 65 and 75 was significantly associated with reduced risk of developing AD (OR, 0.70; P < .04). The largest reduction in Alzheimer’s disease risk (OR, 0.62; P < .04) was among those vaccinated against pneumonia who were noncarriers of the rs2075650 G allele.

Total number of vaccinations against pneumonia and influenza between ages 65 and 75 was also associated with a lower risk for Alzheimer’s disease (OR, 0.88; P < .01). However, the effect was not evident for the influenza vaccination alone.

“The fact that very different pathogens – viral, bacterial, fungal – have been linked to Alzheimer’s disease indicates a possibility that compromised host immunity may play a role in Alzheimer’s disease through increasing overall brain’s vulnerability to various microbes,” said Dr. Ukraintseva.

The current findings support further investigation of pneumococcal vaccine as a “reasonable candidate for repurposing in personalized AD prevention,” she noted. “These results also support the important role of boosting overall immune robustness/resilience in preventing Alzheimer’s disease,” Dr. Ukraintseva added.

Her group is currently working on confirming the findings in another population.

Brain protective?

“Neither study can prove that the benefit is directly related to the vaccine itself, but what they can indicate is that potentially, vaccines are a way to protect your health and brain,” Dr. Edelmayer said.

In a statement, Maria Carrillo, PhD, chief science officer for the Alzheimer’s Association, noted that more research is needed.

The new data call “for further studies in large, diverse clinical trials to inform whether vaccinations as a public health strategy decrease our risk for developing dementia as we age,” Dr. Carillo said.

Funding for the influenza vaccine study was provided by the Christopher Sarofim Family Professorship in Biomedical Informatics and Bioengineering, a UT STARs Award, the Cancer Prevention and Research Institute of Texas, and the National Institutes of Health. Funding for the pneumonia study was provided by the National Institute on Aging. Dr. Amran, Dr. Ukraintseva, Dr. Edelmayer, and Dr. Carrillo have reported no relevant financial relationships.
 

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

Vaccinations against influenza and pneumonia may help protect against Alzheimer’s disease,  two large observational studies suggest.

In a cohort study of more than 9,000 older adults, receiving a single influenza vaccination was associated with a 17% lower prevalence of Alzheimer’s disease compared with not receiving the vaccine. In addition, for those who were vaccinated more than once over the years, there was an additional 13% reduction in Alzheimer’s disease incidence.

In another study, which included more than 5,000 older participants, being vaccinated against pneumonia between the ages of 65 and 75 reduced the risk of developing Alzheimer’s disease by 30%.

The subject of vaccines “is obviously very topical with the COVID-19 pandemic,” said Rebecca M. Edelmayer, PhD, director of scientific engagement for the Alzheimer’s Association. “While these are very preliminary data, these studies do suggest that with vaccination against both respiratory illnesses, there is the potential to lower risk for developing cognitive decline and dementia,” said Dr. Edelmayer, who was not involved in the research.

The findings of both studies were presented at the virtual annual meeting of the Alzheimer’s Association International Conference.

Lower Alzheimer’s disease prevalence

The influenza vaccine study was presented by Albert Amran, a fourth-year medical student at McGovern Medical School at the University of Texas Health Science Center at Houston. The researchers used electronic health record data to create a propensity-matched cohort of 9,066 vaccinated and unvaccinated adults ages 60 and older.

Influenza vaccination, increased frequency of administration, and younger age at time of vaccination were all associated with reduced incidence of Alzheimer’s disease, Mr. Amran reported.

Being vaccinated for influenza was significantly linked to a lower prevalence of Alzheimer’s disease (odds ratio [OR], 0.83; P < .0001) in comparison with not being vaccinated. Receiving more than one vaccination over the years was associated with an additional reduction in AD incidence (OR, 0.87; P = .0342). The protection appeared to be strongest for those who received their first vaccination at a younger age, for example, at age 60 versus 70.

Mr. Amran and research colleagues have two theories as to why influenza vaccination may protect the brain.

One is that vaccination may aid the immune system as people age. “As people get older, their immune systems become less able to control infection. We’ve seen this with the ongoing pandemic, with older people at much higher risk for dying. Giving people the vaccine once a year may help keep the immune system in shape,” Mr. Amran said.

Another theory is that the prevention of influenza itself may be relevant. “Flu infections can be extremely deadly in older patients. Maybe the results of our study will give another reason for people to get vaccinated,” Mr. Amran said.

Pneumonia vaccine

The other study was presented by Svetlana Ukraintseva, PhD, of Duke University, Durham, N.C.

Dr. Ukraintseva and colleagues investigated associations between pneumococcal vaccine, with and without an accompanying influenza vaccine, and the risk for Alzheimer’s disease among 5,146 participants in the Cardiovascular Health Study. Covariates included sex, race, birth cohort, education, smoking, and a known genetic risk factor for Alzheimer’s disease: the rs2075650 G allele in the TOMM40 gene.

In a logistic model with all covariates, vaccination against pneumonia between ages 65 and 75 was significantly associated with reduced risk of developing AD (OR, 0.70; P < .04). The largest reduction in Alzheimer’s disease risk (OR, 0.62; P < .04) was among those vaccinated against pneumonia who were noncarriers of the rs2075650 G allele.

Total number of vaccinations against pneumonia and influenza between ages 65 and 75 was also associated with a lower risk for Alzheimer’s disease (OR, 0.88; P < .01). However, the effect was not evident for the influenza vaccination alone.

“The fact that very different pathogens – viral, bacterial, fungal – have been linked to Alzheimer’s disease indicates a possibility that compromised host immunity may play a role in Alzheimer’s disease through increasing overall brain’s vulnerability to various microbes,” said Dr. Ukraintseva.

The current findings support further investigation of pneumococcal vaccine as a “reasonable candidate for repurposing in personalized AD prevention,” she noted. “These results also support the important role of boosting overall immune robustness/resilience in preventing Alzheimer’s disease,” Dr. Ukraintseva added.

Her group is currently working on confirming the findings in another population.

Brain protective?

“Neither study can prove that the benefit is directly related to the vaccine itself, but what they can indicate is that potentially, vaccines are a way to protect your health and brain,” Dr. Edelmayer said.

In a statement, Maria Carrillo, PhD, chief science officer for the Alzheimer’s Association, noted that more research is needed.

The new data call “for further studies in large, diverse clinical trials to inform whether vaccinations as a public health strategy decrease our risk for developing dementia as we age,” Dr. Carillo said.

Funding for the influenza vaccine study was provided by the Christopher Sarofim Family Professorship in Biomedical Informatics and Bioengineering, a UT STARs Award, the Cancer Prevention and Research Institute of Texas, and the National Institutes of Health. Funding for the pneumonia study was provided by the National Institute on Aging. Dr. Amran, Dr. Ukraintseva, Dr. Edelmayer, and Dr. Carrillo have reported no relevant financial relationships.
 

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

Patients with COVID-19 may be at increased risk of acute ischemic stroke compared with patients with influenza, according to a retrospective cohort study conducted at New York–Presbyterian Hospital and Weill Cornell Medicine, New York. “These findings suggest that clinicians should be vigilant for symptoms and signs of acute ischemic stroke in patients with COVID-19 so that time-sensitive interventions, such as thrombolysis and thrombectomy, can be instituted if possible to reduce the burden of long-term disability,” wrote Alexander E. Merkler and colleagues. Their report is in JAMA Neurology.

While several recent publications have “raised the possibility” of this link, none have had an appropriate control group, noted Dr. Merkler of the department of neurology, Weill Cornell Medicine. “Further elucidation of thrombotic mechanisms in patients with COVID-19 may yield better strategies to prevent disabling thrombotic complications like ischemic stroke,” he added.
 

An increased risk of stroke

The study included 1,916 adults with confirmed COVID-19 (median age 64 years) who were either hospitalized or visited an emergency department between March 4 and May 2, 2020. These cases were compared with a historical cohort of 1,486 patients (median age 62 years) who were hospitalized with laboratory-confirmed influenza A or B between January 1, 2016, and May 31, 2018.

Among the patients with COVID-19, a diagnosis of cerebrovascular disease during hospitalization, a brain computed tomography (CT), or brain magnetic resonance imaging (MRI) was an indication of possible ischemic stroke. These records were then independently reviewed by two board-certified attending neurologists (with a third resolving any disagreement) to adjudicate a final stroke diagnosis. In the influenza cohort, the Cornell Acute Stroke Academic Registry (CAESAR) was used to ascertain ischemic strokes.

The study identified 31 patients with stroke among the COVID-19 cohort (1.6%; 95% confidence interval, 1.1%-2.3%) and 3 in the influenza cohort (0.2%; 95% CI, 0.0%-0.6%). After adjustment for age, sex, and race, stroke risk was almost 8 times higher in the COVID-19 cohort (OR, 7.6; 95% CI, 2.3-25.2).

This association “persisted across multiple sensitivity analyses, with the magnitude of relative associations ranging from 4.0 to 9,” wrote the authors. “This included a sensitivity analysis that adjusted for the number of vascular risk factors and ICU admissions (OR, 4.6; 95% CI, 1.4-15.7).”

The median age of patients with COVID-19 and stroke was 69 years, and the median duration of COVID-19 symptom onset to stroke diagnosis was 16 days. Stroke symptoms were the presenting complaint in only 26% of the patients, while the remainder developing stroke while hospitalized, and more than a third (35%) of all strokes occurred in patients who were mechanically ventilated with severe COVID-19. Inpatient mortality was considerably higher among patients with COVID-19 with stroke versus without (32% vs. 14%; P = .003).

In patients with COVID-19 “most ischemic strokes occurred in older age groups, those with traditional stroke risk factors, and people of color,” wrote the authors. “We also noted that initial plasma D-dimer levels were nearly 3-fold higher in those who received a diagnosis of ischemic stroke than in those who did not” (1.930 mcg/mL vs. 0.682 mcg/mL).

The authors suggested several possible explanations for the elevated risk of stroke in COVID-19. Acute viral illnesses are known to trigger inflammation, and COVID-19 in particular is associated with “a vigorous inflammatory response accompanied by coagulopathy, with elevated D-dimer levels and the frequent presence of antiphospholipid antibodies,” they wrote. The infection is also associated with more severe respiratory syndrome compared with influenza, as well as a heightened risk for complications such as atrial arrhythmias, myocardial infarction, heart failure, myocarditis, and venous thromboses, all of which likely contribute to the risk of ischemic stroke.”
 

COVID or conventional risk factors?

Asked to comment on the study, Benedict Michael, MBChB (Hons), MRCP (Neurol), PhD, from the United Kingdom’s Coronerve Studies Group, a collaborative initiative to study the neurological features of COVID-19, said in an interview that “this study suggests many cases of stroke are occurring in older patients with multiple existing conventional and well recognized risks for stroke, and may simply represent decompensation during sepsis.”

Dr. Michael, a senior clinician scientist fellow at the University of Liverpool and an honorary consultant neurologist at the Walton Centre, was the senior author on a recently published UK-wide surveillance study on the neurological and neuropsychiatric complications of COVID-19 (Lancet Psychiatry. 2020 Jun 25. doi: 10.1016/S2215-0366[20]30287-X).

He said among patients in the New York study, “those with COVID and a stroke appeared to have many conventional risk factors for stroke (and often at higher percentages than COVID patients without a stroke), e.g. hypertension, overweight, diabetes, hyperlipidemia, existing vascular disease affecting the coronary arteries and atrial fibrillation. To establish evidence-based treatment pathways, clearly further studies are needed to determine the biological mechanisms underlying the seemingly higher rate of stroke with COVID-19 than influenza; but this must especially focus on those younger patients without conventional risk factors for stroke (which are largely not included in this study).”

SOURCE: Merkler AE et al. JAMA Neurol. doi: 10.1001/jamaneurol.2020.2730.

Patients with COVID-19 may be at increased risk of acute ischemic stroke compared with patients with influenza, according to a retrospective cohort study conducted at New York–Presbyterian Hospital and Weill Cornell Medicine, New York. “These findings suggest that clinicians should be vigilant for symptoms and signs of acute ischemic stroke in patients with COVID-19 so that time-sensitive interventions, such as thrombolysis and thrombectomy, can be instituted if possible to reduce the burden of long-term disability,” wrote Alexander E. Merkler and colleagues. Their report is in JAMA Neurology.

While several recent publications have “raised the possibility” of this link, none have had an appropriate control group, noted Dr. Merkler of the department of neurology, Weill Cornell Medicine. “Further elucidation of thrombotic mechanisms in patients with COVID-19 may yield better strategies to prevent disabling thrombotic complications like ischemic stroke,” he added.
 

An increased risk of stroke

The study included 1,916 adults with confirmed COVID-19 (median age 64 years) who were either hospitalized or visited an emergency department between March 4 and May 2, 2020. These cases were compared with a historical cohort of 1,486 patients (median age 62 years) who were hospitalized with laboratory-confirmed influenza A or B between January 1, 2016, and May 31, 2018.

Among the patients with COVID-19, a diagnosis of cerebrovascular disease during hospitalization, a brain computed tomography (CT), or brain magnetic resonance imaging (MRI) was an indication of possible ischemic stroke. These records were then independently reviewed by two board-certified attending neurologists (with a third resolving any disagreement) to adjudicate a final stroke diagnosis. In the influenza cohort, the Cornell Acute Stroke Academic Registry (CAESAR) was used to ascertain ischemic strokes.

The study identified 31 patients with stroke among the COVID-19 cohort (1.6%; 95% confidence interval, 1.1%-2.3%) and 3 in the influenza cohort (0.2%; 95% CI, 0.0%-0.6%). After adjustment for age, sex, and race, stroke risk was almost 8 times higher in the COVID-19 cohort (OR, 7.6; 95% CI, 2.3-25.2).

This association “persisted across multiple sensitivity analyses, with the magnitude of relative associations ranging from 4.0 to 9,” wrote the authors. “This included a sensitivity analysis that adjusted for the number of vascular risk factors and ICU admissions (OR, 4.6; 95% CI, 1.4-15.7).”

The median age of patients with COVID-19 and stroke was 69 years, and the median duration of COVID-19 symptom onset to stroke diagnosis was 16 days. Stroke symptoms were the presenting complaint in only 26% of the patients, while the remainder developing stroke while hospitalized, and more than a third (35%) of all strokes occurred in patients who were mechanically ventilated with severe COVID-19. Inpatient mortality was considerably higher among patients with COVID-19 with stroke versus without (32% vs. 14%; P = .003).

In patients with COVID-19 “most ischemic strokes occurred in older age groups, those with traditional stroke risk factors, and people of color,” wrote the authors. “We also noted that initial plasma D-dimer levels were nearly 3-fold higher in those who received a diagnosis of ischemic stroke than in those who did not” (1.930 mcg/mL vs. 0.682 mcg/mL).

The authors suggested several possible explanations for the elevated risk of stroke in COVID-19. Acute viral illnesses are known to trigger inflammation, and COVID-19 in particular is associated with “a vigorous inflammatory response accompanied by coagulopathy, with elevated D-dimer levels and the frequent presence of antiphospholipid antibodies,” they wrote. The infection is also associated with more severe respiratory syndrome compared with influenza, as well as a heightened risk for complications such as atrial arrhythmias, myocardial infarction, heart failure, myocarditis, and venous thromboses, all of which likely contribute to the risk of ischemic stroke.”
 

COVID or conventional risk factors?

Asked to comment on the study, Benedict Michael, MBChB (Hons), MRCP (Neurol), PhD, from the United Kingdom’s Coronerve Studies Group, a collaborative initiative to study the neurological features of COVID-19, said in an interview that “this study suggests many cases of stroke are occurring in older patients with multiple existing conventional and well recognized risks for stroke, and may simply represent decompensation during sepsis.”

Dr. Michael, a senior clinician scientist fellow at the University of Liverpool and an honorary consultant neurologist at the Walton Centre, was the senior author on a recently published UK-wide surveillance study on the neurological and neuropsychiatric complications of COVID-19 (Lancet Psychiatry. 2020 Jun 25. doi: 10.1016/S2215-0366[20]30287-X).

He said among patients in the New York study, “those with COVID and a stroke appeared to have many conventional risk factors for stroke (and often at higher percentages than COVID patients without a stroke), e.g. hypertension, overweight, diabetes, hyperlipidemia, existing vascular disease affecting the coronary arteries and atrial fibrillation. To establish evidence-based treatment pathways, clearly further studies are needed to determine the biological mechanisms underlying the seemingly higher rate of stroke with COVID-19 than influenza; but this must especially focus on those younger patients without conventional risk factors for stroke (which are largely not included in this study).”

SOURCE: Merkler AE et al. JAMA Neurol. doi: 10.1001/jamaneurol.2020.2730.

Patients with COVID-19 may be at increased risk of acute ischemic stroke compared with patients with influenza, according to a retrospective cohort study conducted at New York–Presbyterian Hospital and Weill Cornell Medicine, New York. “These findings suggest that clinicians should be vigilant for symptoms and signs of acute ischemic stroke in patients with COVID-19 so that time-sensitive interventions, such as thrombolysis and thrombectomy, can be instituted if possible to reduce the burden of long-term disability,” wrote Alexander E. Merkler and colleagues. Their report is in JAMA Neurology.

While several recent publications have “raised the possibility” of this link, none have had an appropriate control group, noted Dr. Merkler of the department of neurology, Weill Cornell Medicine. “Further elucidation of thrombotic mechanisms in patients with COVID-19 may yield better strategies to prevent disabling thrombotic complications like ischemic stroke,” he added.
 

An increased risk of stroke

The study included 1,916 adults with confirmed COVID-19 (median age 64 years) who were either hospitalized or visited an emergency department between March 4 and May 2, 2020. These cases were compared with a historical cohort of 1,486 patients (median age 62 years) who were hospitalized with laboratory-confirmed influenza A or B between January 1, 2016, and May 31, 2018.

Among the patients with COVID-19, a diagnosis of cerebrovascular disease during hospitalization, a brain computed tomography (CT), or brain magnetic resonance imaging (MRI) was an indication of possible ischemic stroke. These records were then independently reviewed by two board-certified attending neurologists (with a third resolving any disagreement) to adjudicate a final stroke diagnosis. In the influenza cohort, the Cornell Acute Stroke Academic Registry (CAESAR) was used to ascertain ischemic strokes.

The study identified 31 patients with stroke among the COVID-19 cohort (1.6%; 95% confidence interval, 1.1%-2.3%) and 3 in the influenza cohort (0.2%; 95% CI, 0.0%-0.6%). After adjustment for age, sex, and race, stroke risk was almost 8 times higher in the COVID-19 cohort (OR, 7.6; 95% CI, 2.3-25.2).

This association “persisted across multiple sensitivity analyses, with the magnitude of relative associations ranging from 4.0 to 9,” wrote the authors. “This included a sensitivity analysis that adjusted for the number of vascular risk factors and ICU admissions (OR, 4.6; 95% CI, 1.4-15.7).”

The median age of patients with COVID-19 and stroke was 69 years, and the median duration of COVID-19 symptom onset to stroke diagnosis was 16 days. Stroke symptoms were the presenting complaint in only 26% of the patients, while the remainder developing stroke while hospitalized, and more than a third (35%) of all strokes occurred in patients who were mechanically ventilated with severe COVID-19. Inpatient mortality was considerably higher among patients with COVID-19 with stroke versus without (32% vs. 14%; P = .003).

In patients with COVID-19 “most ischemic strokes occurred in older age groups, those with traditional stroke risk factors, and people of color,” wrote the authors. “We also noted that initial plasma D-dimer levels were nearly 3-fold higher in those who received a diagnosis of ischemic stroke than in those who did not” (1.930 mcg/mL vs. 0.682 mcg/mL).

The authors suggested several possible explanations for the elevated risk of stroke in COVID-19. Acute viral illnesses are known to trigger inflammation, and COVID-19 in particular is associated with “a vigorous inflammatory response accompanied by coagulopathy, with elevated D-dimer levels and the frequent presence of antiphospholipid antibodies,” they wrote. The infection is also associated with more severe respiratory syndrome compared with influenza, as well as a heightened risk for complications such as atrial arrhythmias, myocardial infarction, heart failure, myocarditis, and venous thromboses, all of which likely contribute to the risk of ischemic stroke.”
 

COVID or conventional risk factors?

Asked to comment on the study, Benedict Michael, MBChB (Hons), MRCP (Neurol), PhD, from the United Kingdom’s Coronerve Studies Group, a collaborative initiative to study the neurological features of COVID-19, said in an interview that “this study suggests many cases of stroke are occurring in older patients with multiple existing conventional and well recognized risks for stroke, and may simply represent decompensation during sepsis.”

Dr. Michael, a senior clinician scientist fellow at the University of Liverpool and an honorary consultant neurologist at the Walton Centre, was the senior author on a recently published UK-wide surveillance study on the neurological and neuropsychiatric complications of COVID-19 (Lancet Psychiatry. 2020 Jun 25. doi: 10.1016/S2215-0366[20]30287-X).

He said among patients in the New York study, “those with COVID and a stroke appeared to have many conventional risk factors for stroke (and often at higher percentages than COVID patients without a stroke), e.g. hypertension, overweight, diabetes, hyperlipidemia, existing vascular disease affecting the coronary arteries and atrial fibrillation. To establish evidence-based treatment pathways, clearly further studies are needed to determine the biological mechanisms underlying the seemingly higher rate of stroke with COVID-19 than influenza; but this must especially focus on those younger patients without conventional risk factors for stroke (which are largely not included in this study).”

SOURCE: Merkler AE et al. JAMA Neurol. doi: 10.1001/jamaneurol.2020.2730.

A pair of new vaccines for adults aged 65 years and older will be available for the 2020-2021 flu season – Fluzone high-dose quadrivalent, which replaces the trivalent Fluzone high-dose and Fluad quadrivalent (Seqirus), according to the Centers for Disease Control and Prevention’s Advisory Committee on Immunization Practices.

At a virtual meeting on June 24, the committee voted unanimously to approve the vaccine recommendations for annual influenza immunization of all individuals aged 6 months and older. They also voted to accept some guidance and language changes to the recommendations.

The past flu season was unique in its overlap with the emergence of the COVID-19 coronavirus, which likely contributed to a third peak in reported cases of influenza-like illness at approximately week 14 of last season, said Lisa Grohskopf, MD, of the CDC’s influenza division, who presented data on last year’s activity and the updates for next season.

The CDC estimates that 39,000,000-56,000,000 flu illnesses occurred in the United States from Oct. 1, 2019, to April 4, 2020, said Dr. Grohskopf. Estimates also suggest as many as 740,000 hospitalizations and 62,000 deaths related to the seasonal flu.

Preliminary results of vaccine effectiveness showed 39% overall for the 2019-2020 season, with more substantial protection against influenza B and lower protection against A/H1N1pmd09.

Vaccine safety data from the Vaccine Adverse Event Reporting System and Vaccine Safety Datalink showed no new safety concerns for any flu vaccine types used last year, Dr. Grohskopf noted.

Based on this information, three components (A/H1N1pdm09, A/H3N2, and B/Victoria) have been updated for the 2020-2021 vaccines, said Dr. Grohskopf. The egg-based influenza vaccines will include hemagglutinin derived from an A/Guangdong-Maonan/SWL1536/2019(H1N1)pdm09–like virus, an A/Hong Kong/2671/2019(H3N2)–like virus and a B/Washington/02/2019 (Victoria lineage)–like virus, and (for quadrivalent vaccines) a B/Phuket/3073/2013 (Yamagata lineage)–like virus.

Nonegg vaccines will contain hemagglutinin derived from an A/Hawaii/70/2019 (H1N1)pdm09–like virus, an A/Hong Kong/45/2019 (H3N2)–like virus, a B/Washington/02/2019 (Victoria lineage)–like virus, and a B/Phuket/3073/2013 (Yamagata lineage)–like virus.

New guidance for next year’s flu season includes a change to the language in the contraindications and precautions table to simply read “Contraindications,” with more details in the text explaining package insert contraindications and ACIP recommendations, Dr. Grohskopf said. In addition, updated guidance clarifies that live-attenuated influenza vaccine quadravalents (LAIV4) should not be used in patients with cochlear implants, active cerebrospinal fluid leaks, and anatomical or functional asplenia, based on ACIP’s review of the latest evidence and the availability of alternative vaccines.

ACIP also updated guidance on the use of antivirals and LAIV4. Based on half-lives, language was added indicating that clinicians should assume interference if antivirals are given within certain intervals of LAIV4, Dr. Grohskopf explained. “Newer antivirals peramivir and baloxavir have longer half-lives than oseltamivir and zanamivir, and insufficient data are available on the use of LAIV4 in the setting of antiviral use.”

The ACIP members had no financial conflicts to disclose.
 

A pair of new vaccines for adults aged 65 years and older will be available for the 2020-2021 flu season – Fluzone high-dose quadrivalent, which replaces the trivalent Fluzone high-dose and Fluad quadrivalent (Seqirus), according to the Centers for Disease Control and Prevention’s Advisory Committee on Immunization Practices.

At a virtual meeting on June 24, the committee voted unanimously to approve the vaccine recommendations for annual influenza immunization of all individuals aged 6 months and older. They also voted to accept some guidance and language changes to the recommendations.

The past flu season was unique in its overlap with the emergence of the COVID-19 coronavirus, which likely contributed to a third peak in reported cases of influenza-like illness at approximately week 14 of last season, said Lisa Grohskopf, MD, of the CDC’s influenza division, who presented data on last year’s activity and the updates for next season.

The CDC estimates that 39,000,000-56,000,000 flu illnesses occurred in the United States from Oct. 1, 2019, to April 4, 2020, said Dr. Grohskopf. Estimates also suggest as many as 740,000 hospitalizations and 62,000 deaths related to the seasonal flu.

Preliminary results of vaccine effectiveness showed 39% overall for the 2019-2020 season, with more substantial protection against influenza B and lower protection against A/H1N1pmd09.

Vaccine safety data from the Vaccine Adverse Event Reporting System and Vaccine Safety Datalink showed no new safety concerns for any flu vaccine types used last year, Dr. Grohskopf noted.

Based on this information, three components (A/H1N1pdm09, A/H3N2, and B/Victoria) have been updated for the 2020-2021 vaccines, said Dr. Grohskopf. The egg-based influenza vaccines will include hemagglutinin derived from an A/Guangdong-Maonan/SWL1536/2019(H1N1)pdm09–like virus, an A/Hong Kong/2671/2019(H3N2)–like virus and a B/Washington/02/2019 (Victoria lineage)–like virus, and (for quadrivalent vaccines) a B/Phuket/3073/2013 (Yamagata lineage)–like virus.

Nonegg vaccines will contain hemagglutinin derived from an A/Hawaii/70/2019 (H1N1)pdm09–like virus, an A/Hong Kong/45/2019 (H3N2)–like virus, a B/Washington/02/2019 (Victoria lineage)–like virus, and a B/Phuket/3073/2013 (Yamagata lineage)–like virus.

New guidance for next year’s flu season includes a change to the language in the contraindications and precautions table to simply read “Contraindications,” with more details in the text explaining package insert contraindications and ACIP recommendations, Dr. Grohskopf said. In addition, updated guidance clarifies that live-attenuated influenza vaccine quadravalents (LAIV4) should not be used in patients with cochlear implants, active cerebrospinal fluid leaks, and anatomical or functional asplenia, based on ACIP’s review of the latest evidence and the availability of alternative vaccines.

ACIP also updated guidance on the use of antivirals and LAIV4. Based on half-lives, language was added indicating that clinicians should assume interference if antivirals are given within certain intervals of LAIV4, Dr. Grohskopf explained. “Newer antivirals peramivir and baloxavir have longer half-lives than oseltamivir and zanamivir, and insufficient data are available on the use of LAIV4 in the setting of antiviral use.”

The ACIP members had no financial conflicts to disclose.
 

A pair of new vaccines for adults aged 65 years and older will be available for the 2020-2021 flu season – Fluzone high-dose quadrivalent, which replaces the trivalent Fluzone high-dose and Fluad quadrivalent (Seqirus), according to the Centers for Disease Control and Prevention’s Advisory Committee on Immunization Practices.

At a virtual meeting on June 24, the committee voted unanimously to approve the vaccine recommendations for annual influenza immunization of all individuals aged 6 months and older. They also voted to accept some guidance and language changes to the recommendations.

The past flu season was unique in its overlap with the emergence of the COVID-19 coronavirus, which likely contributed to a third peak in reported cases of influenza-like illness at approximately week 14 of last season, said Lisa Grohskopf, MD, of the CDC’s influenza division, who presented data on last year’s activity and the updates for next season.

The CDC estimates that 39,000,000-56,000,000 flu illnesses occurred in the United States from Oct. 1, 2019, to April 4, 2020, said Dr. Grohskopf. Estimates also suggest as many as 740,000 hospitalizations and 62,000 deaths related to the seasonal flu.

Preliminary results of vaccine effectiveness showed 39% overall for the 2019-2020 season, with more substantial protection against influenza B and lower protection against A/H1N1pmd09.

Vaccine safety data from the Vaccine Adverse Event Reporting System and Vaccine Safety Datalink showed no new safety concerns for any flu vaccine types used last year, Dr. Grohskopf noted.

Based on this information, three components (A/H1N1pdm09, A/H3N2, and B/Victoria) have been updated for the 2020-2021 vaccines, said Dr. Grohskopf. The egg-based influenza vaccines will include hemagglutinin derived from an A/Guangdong-Maonan/SWL1536/2019(H1N1)pdm09–like virus, an A/Hong Kong/2671/2019(H3N2)–like virus and a B/Washington/02/2019 (Victoria lineage)–like virus, and (for quadrivalent vaccines) a B/Phuket/3073/2013 (Yamagata lineage)–like virus.

Nonegg vaccines will contain hemagglutinin derived from an A/Hawaii/70/2019 (H1N1)pdm09–like virus, an A/Hong Kong/45/2019 (H3N2)–like virus, a B/Washington/02/2019 (Victoria lineage)–like virus, and a B/Phuket/3073/2013 (Yamagata lineage)–like virus.

New guidance for next year’s flu season includes a change to the language in the contraindications and precautions table to simply read “Contraindications,” with more details in the text explaining package insert contraindications and ACIP recommendations, Dr. Grohskopf said. In addition, updated guidance clarifies that live-attenuated influenza vaccine quadravalents (LAIV4) should not be used in patients with cochlear implants, active cerebrospinal fluid leaks, and anatomical or functional asplenia, based on ACIP’s review of the latest evidence and the availability of alternative vaccines.

ACIP also updated guidance on the use of antivirals and LAIV4. Based on half-lives, language was added indicating that clinicians should assume interference if antivirals are given within certain intervals of LAIV4, Dr. Grohskopf explained. “Newer antivirals peramivir and baloxavir have longer half-lives than oseltamivir and zanamivir, and insufficient data are available on the use of LAIV4 in the setting of antiviral use.”

The ACIP members had no financial conflicts to disclose.
 

About 6% of parents in the United States are hesitant about routine childhood vaccination, whereas 26% are hesitant about yearly influenza vaccination, according to a nationally representative survey.

MarianVejcik/Getty Images

Influenza vaccination hesitancy may be driven by concerns about vaccine effectiveness, researchers wrote in Pediatrics. These findings “underscore the importance of better communicating to providers and parents the effectiveness of influenza vaccines in reducing severity and morbidity from influenza, even in years when the vaccine has relatively low effectiveness,” noted Allison Kempe, MD, MPH, professor of pediatrics and director of the Adult and Child Consortium for Health Outcomes Research and Delivery Science at the University of Colorado at Denver, Aurora, and colleagues.

The World Health Organization considers vaccine hesitancy a leading threat to global health, but national data about vaccine hesitancy in the United States are limited. To assess hesitancy about routine childhood and influenza vaccinations and related factors, Dr. Kempe and colleagues surveyed more than 2,000 parents in February 2019.

The investigators used an online panel to survey a nationally representative sample of families with children aged between 6 months and 18 years. Parents completed a modified version of the Vaccine Hesitancy Scale, which measures confidence in and concerns about vaccines. Parents with an average score greater than 3 on the scale were considered hesitant.

Factors associated with vaccine hesitancy

Of 4,445 parents sampled, 2,176 completed the survey and 2,052 were eligible respondents. For routine childhood vaccines, the average score on the modified Vaccine Hesitancy Scale was 2 and the percentage of hesitant parents was 6%. For influenza vaccine, the average score was 2 and the percentage of hesitant parents was 26%.

Among hesitant parents, 68% had deferred or refused routine childhood vaccination, compared with 9% of nonhesitant parents (risk ratio, 8.0). For the influenza vaccine, 70% of hesitant parents had deferred or refused influenza vaccination for their child versus 10% of nonhesitant parents (RR, 7.0). Parents were more likely to strongly agree that routine childhood vaccines are effective, compared with the influenza vaccine (70% vs. 26%). “Hesitancy about influenza vaccination is largely driven by concerns about low vaccine effectiveness,” Dr. Kempe and associates wrote.

Although concern about serious side effects was the factor most associated with hesitancy, the percentage of parents who were strongly (12%) or somewhat (27%) concerned about serious side effects was the same for routine childhood vaccines and influenza vaccines. Other factors associated with hesitancy for both routine childhood vaccines and influenza vaccines included lower educational level and household income less than 400% of the federal poverty level.

The survey data may be subject to reporting bias based on social desirability, the authors noted. In addition, the exclusion of infants younger than 6 months may have resulted in an underestimate of hesitancy.

“Although influenza vaccine could be included as a ‘routine’ vaccine, in that it is recommended yearly, we hypothesized that parents view it differently from other childhood vaccines because each year it needs to be given again, its content and effectiveness vary, and it addresses a disease that is often perceived as minor, compared with other childhood diseases,” Dr. Kempe and colleagues wrote. Interventions to counter hesitancy have “a surprising lack of evidence,” and “more work needs to be done to develop methods that are practical and effective for convincing vaccine-hesitant parents to vaccinate.”
 

Logical next step

“From the pragmatic standpoint of improving immunization rates and disease control, determining the correct evidence-based messaging to counter these perceptions is the next logical step,” Annabelle de St. Maurice, MD, MPH, an assistant professor of pediatrics in the division of infectious diseases at University of California, Los Angeles, and Kathryn Edwards, MD, a professor of pediatrics and director of the vaccine research program at Vanderbilt University, Nashville, wrote in an accompanying editorial.

“Communications should be focused on the burden of influenza in children, rebranding influenza vaccine as a ‘routine’ childhood immunization, reassurance on influenza vaccine safety, and discussion of the efficacy of influenza vaccine in preventing severe disease,” they wrote. “Even in the years when there is a poor match, the vaccine is impactful.”

The research was supported by the National Institutes of Health. Two study authors disclosed financial ties to Sanofi Pasteur, with one also disclosing financial ties to Merck, for work related to vaccinations. The remaining investigators had no relevant financial disclosures. Dr. de St. Maurice indicated that she had no relevant financial disclosures. Dr. Edwards disclosed grants from the Centers for Disease Control and Prevention and the NIH; consulting for Merck, Bionet, and IBM; and serving on data safety and monitoring boards for Sanofi, X4 Pharmaceuticals, Seqirus, Moderna, and Pfizer.

jremaly@mdedge.com

SOURCE: Kempe A et al. Pediatrics. 2020 Jun 15. doi: 10.1542/peds.2019-3852.
 

About 6% of parents in the United States are hesitant about routine childhood vaccination, whereas 26% are hesitant about yearly influenza vaccination, according to a nationally representative survey.

MarianVejcik/Getty Images

Influenza vaccination hesitancy may be driven by concerns about vaccine effectiveness, researchers wrote in Pediatrics. These findings “underscore the importance of better communicating to providers and parents the effectiveness of influenza vaccines in reducing severity and morbidity from influenza, even in years when the vaccine has relatively low effectiveness,” noted Allison Kempe, MD, MPH, professor of pediatrics and director of the Adult and Child Consortium for Health Outcomes Research and Delivery Science at the University of Colorado at Denver, Aurora, and colleagues.

The World Health Organization considers vaccine hesitancy a leading threat to global health, but national data about vaccine hesitancy in the United States are limited. To assess hesitancy about routine childhood and influenza vaccinations and related factors, Dr. Kempe and colleagues surveyed more than 2,000 parents in February 2019.

The investigators used an online panel to survey a nationally representative sample of families with children aged between 6 months and 18 years. Parents completed a modified version of the Vaccine Hesitancy Scale, which measures confidence in and concerns about vaccines. Parents with an average score greater than 3 on the scale were considered hesitant.

Factors associated with vaccine hesitancy

Of 4,445 parents sampled, 2,176 completed the survey and 2,052 were eligible respondents. For routine childhood vaccines, the average score on the modified Vaccine Hesitancy Scale was 2 and the percentage of hesitant parents was 6%. For influenza vaccine, the average score was 2 and the percentage of hesitant parents was 26%.

Among hesitant parents, 68% had deferred or refused routine childhood vaccination, compared with 9% of nonhesitant parents (risk ratio, 8.0). For the influenza vaccine, 70% of hesitant parents had deferred or refused influenza vaccination for their child versus 10% of nonhesitant parents (RR, 7.0). Parents were more likely to strongly agree that routine childhood vaccines are effective, compared with the influenza vaccine (70% vs. 26%). “Hesitancy about influenza vaccination is largely driven by concerns about low vaccine effectiveness,” Dr. Kempe and associates wrote.

Although concern about serious side effects was the factor most associated with hesitancy, the percentage of parents who were strongly (12%) or somewhat (27%) concerned about serious side effects was the same for routine childhood vaccines and influenza vaccines. Other factors associated with hesitancy for both routine childhood vaccines and influenza vaccines included lower educational level and household income less than 400% of the federal poverty level.

The survey data may be subject to reporting bias based on social desirability, the authors noted. In addition, the exclusion of infants younger than 6 months may have resulted in an underestimate of hesitancy.

“Although influenza vaccine could be included as a ‘routine’ vaccine, in that it is recommended yearly, we hypothesized that parents view it differently from other childhood vaccines because each year it needs to be given again, its content and effectiveness vary, and it addresses a disease that is often perceived as minor, compared with other childhood diseases,” Dr. Kempe and colleagues wrote. Interventions to counter hesitancy have “a surprising lack of evidence,” and “more work needs to be done to develop methods that are practical and effective for convincing vaccine-hesitant parents to vaccinate.”
 

Logical next step

“From the pragmatic standpoint of improving immunization rates and disease control, determining the correct evidence-based messaging to counter these perceptions is the next logical step,” Annabelle de St. Maurice, MD, MPH, an assistant professor of pediatrics in the division of infectious diseases at University of California, Los Angeles, and Kathryn Edwards, MD, a professor of pediatrics and director of the vaccine research program at Vanderbilt University, Nashville, wrote in an accompanying editorial.

“Communications should be focused on the burden of influenza in children, rebranding influenza vaccine as a ‘routine’ childhood immunization, reassurance on influenza vaccine safety, and discussion of the efficacy of influenza vaccine in preventing severe disease,” they wrote. “Even in the years when there is a poor match, the vaccine is impactful.”

The research was supported by the National Institutes of Health. Two study authors disclosed financial ties to Sanofi Pasteur, with one also disclosing financial ties to Merck, for work related to vaccinations. The remaining investigators had no relevant financial disclosures. Dr. de St. Maurice indicated that she had no relevant financial disclosures. Dr. Edwards disclosed grants from the Centers for Disease Control and Prevention and the NIH; consulting for Merck, Bionet, and IBM; and serving on data safety and monitoring boards for Sanofi, X4 Pharmaceuticals, Seqirus, Moderna, and Pfizer.

jremaly@mdedge.com

SOURCE: Kempe A et al. Pediatrics. 2020 Jun 15. doi: 10.1542/peds.2019-3852.
 

About 6% of parents in the United States are hesitant about routine childhood vaccination, whereas 26% are hesitant about yearly influenza vaccination, according to a nationally representative survey.

MarianVejcik/Getty Images

Influenza vaccination hesitancy may be driven by concerns about vaccine effectiveness, researchers wrote in Pediatrics. These findings “underscore the importance of better communicating to providers and parents the effectiveness of influenza vaccines in reducing severity and morbidity from influenza, even in years when the vaccine has relatively low effectiveness,” noted Allison Kempe, MD, MPH, professor of pediatrics and director of the Adult and Child Consortium for Health Outcomes Research and Delivery Science at the University of Colorado at Denver, Aurora, and colleagues.

The World Health Organization considers vaccine hesitancy a leading threat to global health, but national data about vaccine hesitancy in the United States are limited. To assess hesitancy about routine childhood and influenza vaccinations and related factors, Dr. Kempe and colleagues surveyed more than 2,000 parents in February 2019.

The investigators used an online panel to survey a nationally representative sample of families with children aged between 6 months and 18 years. Parents completed a modified version of the Vaccine Hesitancy Scale, which measures confidence in and concerns about vaccines. Parents with an average score greater than 3 on the scale were considered hesitant.

Factors associated with vaccine hesitancy

Of 4,445 parents sampled, 2,176 completed the survey and 2,052 were eligible respondents. For routine childhood vaccines, the average score on the modified Vaccine Hesitancy Scale was 2 and the percentage of hesitant parents was 6%. For influenza vaccine, the average score was 2 and the percentage of hesitant parents was 26%.

Among hesitant parents, 68% had deferred or refused routine childhood vaccination, compared with 9% of nonhesitant parents (risk ratio, 8.0). For the influenza vaccine, 70% of hesitant parents had deferred or refused influenza vaccination for their child versus 10% of nonhesitant parents (RR, 7.0). Parents were more likely to strongly agree that routine childhood vaccines are effective, compared with the influenza vaccine (70% vs. 26%). “Hesitancy about influenza vaccination is largely driven by concerns about low vaccine effectiveness,” Dr. Kempe and associates wrote.

Although concern about serious side effects was the factor most associated with hesitancy, the percentage of parents who were strongly (12%) or somewhat (27%) concerned about serious side effects was the same for routine childhood vaccines and influenza vaccines. Other factors associated with hesitancy for both routine childhood vaccines and influenza vaccines included lower educational level and household income less than 400% of the federal poverty level.

The survey data may be subject to reporting bias based on social desirability, the authors noted. In addition, the exclusion of infants younger than 6 months may have resulted in an underestimate of hesitancy.

“Although influenza vaccine could be included as a ‘routine’ vaccine, in that it is recommended yearly, we hypothesized that parents view it differently from other childhood vaccines because each year it needs to be given again, its content and effectiveness vary, and it addresses a disease that is often perceived as minor, compared with other childhood diseases,” Dr. Kempe and colleagues wrote. Interventions to counter hesitancy have “a surprising lack of evidence,” and “more work needs to be done to develop methods that are practical and effective for convincing vaccine-hesitant parents to vaccinate.”
 

Logical next step

“From the pragmatic standpoint of improving immunization rates and disease control, determining the correct evidence-based messaging to counter these perceptions is the next logical step,” Annabelle de St. Maurice, MD, MPH, an assistant professor of pediatrics in the division of infectious diseases at University of California, Los Angeles, and Kathryn Edwards, MD, a professor of pediatrics and director of the vaccine research program at Vanderbilt University, Nashville, wrote in an accompanying editorial.

“Communications should be focused on the burden of influenza in children, rebranding influenza vaccine as a ‘routine’ childhood immunization, reassurance on influenza vaccine safety, and discussion of the efficacy of influenza vaccine in preventing severe disease,” they wrote. “Even in the years when there is a poor match, the vaccine is impactful.”

The research was supported by the National Institutes of Health. Two study authors disclosed financial ties to Sanofi Pasteur, with one also disclosing financial ties to Merck, for work related to vaccinations. The remaining investigators had no relevant financial disclosures. Dr. de St. Maurice indicated that she had no relevant financial disclosures. Dr. Edwards disclosed grants from the Centers for Disease Control and Prevention and the NIH; consulting for Merck, Bionet, and IBM; and serving on data safety and monitoring boards for Sanofi, X4 Pharmaceuticals, Seqirus, Moderna, and Pfizer.

jremaly@mdedge.com

SOURCE: Kempe A et al. Pediatrics. 2020 Jun 15. doi: 10.1542/peds.2019-3852.
 

COVID-19 now. The urban phase of the U.S. pandemic is leveling somewhat, while the rural phase is accelerating – in part because of food processing and handling industries. The pediatric burden has been surprisingly small, with the multisystem inflammatory disease (MIS-c) in children noted in several hundred cases now being seen across the country.

CDC

Next wave? Given ongoing COVID-19 disease, controversy rages about when and how to re-open the country. Regardless how more reopening occurs over the next months, we should expect a next or ongoing COVID-19 wave, particularly given loss of social distancing during social justice protests. A sawtooth disease prevalence pattern is predicted by many experts: a drop in prevalence leading to reopening, leading to scattered prevalence increases and regional if not local restriction tightening, followed by another drop in prevalence. Then “rinse and repeat” until 70% of the population is immune either by disease experience or vaccine-induced immunity, likely sometime in 2021.

Influenza too. A COVID-19 up-cycle is likely during influenza season, although influenza season’s onset could be altered because of whatever social distancing rules are in place in November and December. That said, we need to consider the worst. We have seen what happens if we fail to prepare and then react only after a prevalent respiratory infection has surged into the overall population. Best estimates are that at most 20% of the U.S. population is currently immune to SARS-CoV-2. Given that at least some of that 20% of individuals currently immune to SARS-CoV-2 will lose their neutralizing antibody over the next 4-6 months, we can still expect 70%-80% of the U.S. population to be susceptible to SARS-CoV-2 infection in the fall of 2020.

Pediatric preparedness. As pediatric providers, we have struggled with lower patient loads and dramatic income losses/declines. Many clinics/offices’ attendance remain less than 50% of pre–COVID-19 levels, with necessary furloughs of personnel and spotty office hours. But influenza is coming, and SARS-CoV-2 will not be gone yet. How do we prepare for concurrent influenza and COVID-19?

The annual purchase/administration of influenza vaccine in summer/fall is expensive, time consuming, and logistically difficult even in the best times. Given the loss of income, likely reluctance of patients to come to clinics/offices if COVID-19 is still circulating, and likely need for some form of social distancing during late summer and early fall, how will providers, health departments, and hospitals implement influenza vaccine administration this year?

Minimize double whammy infections. Maximizing influenza vaccine uptake during the COVID-19 pandemic is super important. It is easy to understand why we should maximize influenza protection in SARS-CoV-2 vulnerables (elderly or persons with existing comorbidities). But is it as critical for otherwise healthy children? My answer is yes.

Children are not currently known as SARS-CoV-2 vectors, but children are excellent influenza vectors, shedding higher titers for longer than other age groups. As with SARS-CoV-2, influenza exposure is cumulative, i.e., the more intense and more frequently a person is exposed, the more likely that infection/disease will result. So, the fewer who get and can transmit influenza during the COVID-19 pandemic, the fewer people are likely to get a double whammy of SARS-CoV-2 concurrent or in tandem with influenza. Double whammy infections likely would further increase the medical care burden and return us to March-April crisis mode.

One alarming new question is whether recent influenza could make children vulnerable to SARS-CoV-2 and trigger hospitalizations. A surge in pediatric plus adult COVID-19 disease plus a surge in all-ages influenza disease would likely break the medical care system, at least in some areas.

CDC

Staggering COVID-19 burden. As of June 8, we have had approximately 2 million SARS-CoV-2 cases with 500,000 hospitalizations and 120,000 deaths. Over the past 10 years, total annual U.S. influenza hospitalizations ranged from 180,000 (2011-2012) to 825,000 (2017-2018). The interquartile range for hospitalization length of stay for influenza is 4-6 days¹ vs. 15-23 days² for SARS-CoV-2. One COVID-19 hospitalization uses hospital resources roughly equal to four influenza hospitalizations. To date COVID-19 hospitalizations have used resources equal to an estimated 1.9 million influenza hospitalizations – over twice the worst influenza season in this century – and we are still on the rise. We are likely not even halfway to truly controlling the U.S. pandemic, so expect another 500,000 hospitalizations – equal to another 1.9 million influenza hospitalizations. Further, pneumonia deaths have skyrocketed this year when COVID-19 was superimposed on the last third of influenza season. One hope is that widespread use of antivirals (for example, new antivirals, convalescent plasma, or other interventions) can reduce length of stay by 30% for COVID-19 hospitalizations, yet even with that the numbers remain grim.

Less influenza disease can free up medical resources. Planning ahead could prevent a bad influenza season (for example, up to 850,000 hospitalizations just for influenza). Can we preemptively use vaccine to reduce influenza hospitalizations below 2011-2012 levels – less than 150,000 hospitalizations? Perhaps, if we start by reducing pediatric influenza.

1. Aim to exceed 75% influenza vaccine uptake in your patients.

a. It is ambitious, but if there was ever a year that needed influenza herd immunity, it is 2020-2021.

2. Review practice/group/institution plans for vaccine purchase and ensure adequate personnel to administer vaccine.

3. Plan safe and efficient processes to vaccinate large numbers in August through November.

a. Consider that routine and influenza vaccines can be given concurrently with the annual uptick in school and sports physical examinations.

b. What social distancing and masking rules will be needed?

i. Will patients need to bring their own masks, or will you supply them?

c. What extra supplies and efforts are needed, e.g. hand sanitizer, new signage, 6-foot interval markings on floors or sidewalks, families calling from parking lot to announce their arrivals, etc.?

d. Remember younger patients need two doses before Dec 1, 2020.

e. Be creative, for example, are parking-lot tents for influenza vaccination feasible?

f. Can we partner with other providers to implement influenza vaccine–specific mass clinics?

Ramping up to give seasonal influenza vaccine in 2020 is daunting. But if we do not prepare, it will be even more difficult. Let’s make this the mildest influenza season in memory by vaccinating more than any time in memory – and by doing so, we can hope to blunt medical care burdens despite ongoing COVID-19 disease.
 

Dr. Harrison is professor of pediatrics and pediatric infectious diseases at Children’s Mercy Kansas City (Mo.). Children’s Mercy receives funding from GlaxoSmithKline, Merck, and Pfizer for vaccine research studies on which Dr. Harrison is an investigator. Email him at pdnews@mdedge.com.
 

References

1.. HCUP Statistical Brief #253. 2019 Oct.

2. medrxiv. 2020 Apr 10. doi: 10.1101/2020.04.07.20057299.
 

COVID-19 now. The urban phase of the U.S. pandemic is leveling somewhat, while the rural phase is accelerating – in part because of food processing and handling industries. The pediatric burden has been surprisingly small, with the multisystem inflammatory disease (MIS-c) in children noted in several hundred cases now being seen across the country.

CDC

Next wave? Given ongoing COVID-19 disease, controversy rages about when and how to re-open the country. Regardless how more reopening occurs over the next months, we should expect a next or ongoing COVID-19 wave, particularly given loss of social distancing during social justice protests. A sawtooth disease prevalence pattern is predicted by many experts: a drop in prevalence leading to reopening, leading to scattered prevalence increases and regional if not local restriction tightening, followed by another drop in prevalence. Then “rinse and repeat” until 70% of the population is immune either by disease experience or vaccine-induced immunity, likely sometime in 2021.

Influenza too. A COVID-19 up-cycle is likely during influenza season, although influenza season’s onset could be altered because of whatever social distancing rules are in place in November and December. That said, we need to consider the worst. We have seen what happens if we fail to prepare and then react only after a prevalent respiratory infection has surged into the overall population. Best estimates are that at most 20% of the U.S. population is currently immune to SARS-CoV-2. Given that at least some of that 20% of individuals currently immune to SARS-CoV-2 will lose their neutralizing antibody over the next 4-6 months, we can still expect 70%-80% of the U.S. population to be susceptible to SARS-CoV-2 infection in the fall of 2020.

Pediatric preparedness. As pediatric providers, we have struggled with lower patient loads and dramatic income losses/declines. Many clinics/offices’ attendance remain less than 50% of pre–COVID-19 levels, with necessary furloughs of personnel and spotty office hours. But influenza is coming, and SARS-CoV-2 will not be gone yet. How do we prepare for concurrent influenza and COVID-19?

The annual purchase/administration of influenza vaccine in summer/fall is expensive, time consuming, and logistically difficult even in the best times. Given the loss of income, likely reluctance of patients to come to clinics/offices if COVID-19 is still circulating, and likely need for some form of social distancing during late summer and early fall, how will providers, health departments, and hospitals implement influenza vaccine administration this year?

Minimize double whammy infections. Maximizing influenza vaccine uptake during the COVID-19 pandemic is super important. It is easy to understand why we should maximize influenza protection in SARS-CoV-2 vulnerables (elderly or persons with existing comorbidities). But is it as critical for otherwise healthy children? My answer is yes.

Children are not currently known as SARS-CoV-2 vectors, but children are excellent influenza vectors, shedding higher titers for longer than other age groups. As with SARS-CoV-2, influenza exposure is cumulative, i.e., the more intense and more frequently a person is exposed, the more likely that infection/disease will result. So, the fewer who get and can transmit influenza during the COVID-19 pandemic, the fewer people are likely to get a double whammy of SARS-CoV-2 concurrent or in tandem with influenza. Double whammy infections likely would further increase the medical care burden and return us to March-April crisis mode.

One alarming new question is whether recent influenza could make children vulnerable to SARS-CoV-2 and trigger hospitalizations. A surge in pediatric plus adult COVID-19 disease plus a surge in all-ages influenza disease would likely break the medical care system, at least in some areas.

CDC

Staggering COVID-19 burden. As of June 8, we have had approximately 2 million SARS-CoV-2 cases with 500,000 hospitalizations and 120,000 deaths. Over the past 10 years, total annual U.S. influenza hospitalizations ranged from 180,000 (2011-2012) to 825,000 (2017-2018). The interquartile range for hospitalization length of stay for influenza is 4-6 days¹ vs. 15-23 days² for SARS-CoV-2. One COVID-19 hospitalization uses hospital resources roughly equal to four influenza hospitalizations. To date COVID-19 hospitalizations have used resources equal to an estimated 1.9 million influenza hospitalizations – over twice the worst influenza season in this century – and we are still on the rise. We are likely not even halfway to truly controlling the U.S. pandemic, so expect another 500,000 hospitalizations – equal to another 1.9 million influenza hospitalizations. Further, pneumonia deaths have skyrocketed this year when COVID-19 was superimposed on the last third of influenza season. One hope is that widespread use of antivirals (for example, new antivirals, convalescent plasma, or other interventions) can reduce length of stay by 30% for COVID-19 hospitalizations, yet even with that the numbers remain grim.

Less influenza disease can free up medical resources. Planning ahead could prevent a bad influenza season (for example, up to 850,000 hospitalizations just for influenza). Can we preemptively use vaccine to reduce influenza hospitalizations below 2011-2012 levels – less than 150,000 hospitalizations? Perhaps, if we start by reducing pediatric influenza.

1. Aim to exceed 75% influenza vaccine uptake in your patients.

a. It is ambitious, but if there was ever a year that needed influenza herd immunity, it is 2020-2021.

2. Review practice/group/institution plans for vaccine purchase and ensure adequate personnel to administer vaccine.

3. Plan safe and efficient processes to vaccinate large numbers in August through November.

a. Consider that routine and influenza vaccines can be given concurrently with the annual uptick in school and sports physical examinations.

b. What social distancing and masking rules will be needed?

i. Will patients need to bring their own masks, or will you supply them?

c. What extra supplies and efforts are needed, e.g. hand sanitizer, new signage, 6-foot interval markings on floors or sidewalks, families calling from parking lot to announce their arrivals, etc.?

d. Remember younger patients need two doses before Dec 1, 2020.

e. Be creative, for example, are parking-lot tents for influenza vaccination feasible?

f. Can we partner with other providers to implement influenza vaccine–specific mass clinics?

Ramping up to give seasonal influenza vaccine in 2020 is daunting. But if we do not prepare, it will be even more difficult. Let’s make this the mildest influenza season in memory by vaccinating more than any time in memory – and by doing so, we can hope to blunt medical care burdens despite ongoing COVID-19 disease.
 

Dr. Harrison is professor of pediatrics and pediatric infectious diseases at Children’s Mercy Kansas City (Mo.). Children’s Mercy receives funding from GlaxoSmithKline, Merck, and Pfizer for vaccine research studies on which Dr. Harrison is an investigator. Email him at pdnews@mdedge.com.
 

References

1.. HCUP Statistical Brief #253. 2019 Oct.

2. medrxiv. 2020 Apr 10. doi: 10.1101/2020.04.07.20057299.
 

COVID-19 now. The urban phase of the U.S. pandemic is leveling somewhat, while the rural phase is accelerating – in part because of food processing and handling industries. The pediatric burden has been surprisingly small, with the multisystem inflammatory disease (MIS-c) in children noted in several hundred cases now being seen across the country.

CDC

Next wave? Given ongoing COVID-19 disease, controversy rages about when and how to re-open the country. Regardless how more reopening occurs over the next months, we should expect a next or ongoing COVID-19 wave, particularly given loss of social distancing during social justice protests. A sawtooth disease prevalence pattern is predicted by many experts: a drop in prevalence leading to reopening, leading to scattered prevalence increases and regional if not local restriction tightening, followed by another drop in prevalence. Then “rinse and repeat” until 70% of the population is immune either by disease experience or vaccine-induced immunity, likely sometime in 2021.

Influenza too. A COVID-19 up-cycle is likely during influenza season, although influenza season’s onset could be altered because of whatever social distancing rules are in place in November and December. That said, we need to consider the worst. We have seen what happens if we fail to prepare and then react only after a prevalent respiratory infection has surged into the overall population. Best estimates are that at most 20% of the U.S. population is currently immune to SARS-CoV-2. Given that at least some of that 20% of individuals currently immune to SARS-CoV-2 will lose their neutralizing antibody over the next 4-6 months, we can still expect 70%-80% of the U.S. population to be susceptible to SARS-CoV-2 infection in the fall of 2020.

Pediatric preparedness. As pediatric providers, we have struggled with lower patient loads and dramatic income losses/declines. Many clinics/offices’ attendance remain less than 50% of pre–COVID-19 levels, with necessary furloughs of personnel and spotty office hours. But influenza is coming, and SARS-CoV-2 will not be gone yet. How do we prepare for concurrent influenza and COVID-19?

The annual purchase/administration of influenza vaccine in summer/fall is expensive, time consuming, and logistically difficult even in the best times. Given the loss of income, likely reluctance of patients to come to clinics/offices if COVID-19 is still circulating, and likely need for some form of social distancing during late summer and early fall, how will providers, health departments, and hospitals implement influenza vaccine administration this year?

Minimize double whammy infections. Maximizing influenza vaccine uptake during the COVID-19 pandemic is super important. It is easy to understand why we should maximize influenza protection in SARS-CoV-2 vulnerables (elderly or persons with existing comorbidities). But is it as critical for otherwise healthy children? My answer is yes.

Children are not currently known as SARS-CoV-2 vectors, but children are excellent influenza vectors, shedding higher titers for longer than other age groups. As with SARS-CoV-2, influenza exposure is cumulative, i.e., the more intense and more frequently a person is exposed, the more likely that infection/disease will result. So, the fewer who get and can transmit influenza during the COVID-19 pandemic, the fewer people are likely to get a double whammy of SARS-CoV-2 concurrent or in tandem with influenza. Double whammy infections likely would further increase the medical care burden and return us to March-April crisis mode.

One alarming new question is whether recent influenza could make children vulnerable to SARS-CoV-2 and trigger hospitalizations. A surge in pediatric plus adult COVID-19 disease plus a surge in all-ages influenza disease would likely break the medical care system, at least in some areas.

CDC

Staggering COVID-19 burden. As of June 8, we have had approximately 2 million SARS-CoV-2 cases with 500,000 hospitalizations and 120,000 deaths. Over the past 10 years, total annual U.S. influenza hospitalizations ranged from 180,000 (2011-2012) to 825,000 (2017-2018). The interquartile range for hospitalization length of stay for influenza is 4-6 days¹ vs. 15-23 days² for SARS-CoV-2. One COVID-19 hospitalization uses hospital resources roughly equal to four influenza hospitalizations. To date COVID-19 hospitalizations have used resources equal to an estimated 1.9 million influenza hospitalizations – over twice the worst influenza season in this century – and we are still on the rise. We are likely not even halfway to truly controlling the U.S. pandemic, so expect another 500,000 hospitalizations – equal to another 1.9 million influenza hospitalizations. Further, pneumonia deaths have skyrocketed this year when COVID-19 was superimposed on the last third of influenza season. One hope is that widespread use of antivirals (for example, new antivirals, convalescent plasma, or other interventions) can reduce length of stay by 30% for COVID-19 hospitalizations, yet even with that the numbers remain grim.

Less influenza disease can free up medical resources. Planning ahead could prevent a bad influenza season (for example, up to 850,000 hospitalizations just for influenza). Can we preemptively use vaccine to reduce influenza hospitalizations below 2011-2012 levels – less than 150,000 hospitalizations? Perhaps, if we start by reducing pediatric influenza.

1. Aim to exceed 75% influenza vaccine uptake in your patients.

a. It is ambitious, but if there was ever a year that needed influenza herd immunity, it is 2020-2021.

2. Review practice/group/institution plans for vaccine purchase and ensure adequate personnel to administer vaccine.

3. Plan safe and efficient processes to vaccinate large numbers in August through November.

a. Consider that routine and influenza vaccines can be given concurrently with the annual uptick in school and sports physical examinations.

b. What social distancing and masking rules will be needed?

i. Will patients need to bring their own masks, or will you supply them?

c. What extra supplies and efforts are needed, e.g. hand sanitizer, new signage, 6-foot interval markings on floors or sidewalks, families calling from parking lot to announce their arrivals, etc.?

d. Remember younger patients need two doses before Dec 1, 2020.

e. Be creative, for example, are parking-lot tents for influenza vaccination feasible?

f. Can we partner with other providers to implement influenza vaccine–specific mass clinics?

Ramping up to give seasonal influenza vaccine in 2020 is daunting. But if we do not prepare, it will be even more difficult. Let’s make this the mildest influenza season in memory by vaccinating more than any time in memory – and by doing so, we can hope to blunt medical care burdens despite ongoing COVID-19 disease.
 

Dr. Harrison is professor of pediatrics and pediatric infectious diseases at Children’s Mercy Kansas City (Mo.). Children’s Mercy receives funding from GlaxoSmithKline, Merck, and Pfizer for vaccine research studies on which Dr. Harrison is an investigator. Email him at pdnews@mdedge.com.
 

References

1.. HCUP Statistical Brief #253. 2019 Oct.

2. medrxiv. 2020 Apr 10. doi: 10.1101/2020.04.07.20057299.
 

Oral baloxavir marboxil is effective and well tolerated at alleviating symptoms in otherwise healthy children with acute influenza, according to Jeffrey Baker, MD, of Clinical Research Prime, Idaho Falls, and associates.

In the double-blind, randomized, controlled MiniSTONE-2 phase 3 trial, the investigators randomized 112 children aged 1-12 years to baloxavir and 57 to oseltamivir. The predominant influenza A subtype was H3N2 for both groups, followed by H1N1pdm09. Demographics and baseline characteristics were similar between treatment groups, the investigators wrote in the Pediatric Infectious Disease Journal.

The time to alleviation of signs and symptoms was a median 138 hours for those receiving baloxavir and 150 hours for those receiving oseltamivir, a nonsignificant difference. Duration of fever and of all symptoms also were similar between groups, as was the time to return to normal health and activity.

A total of 122 adverse events were reported in 84 children, with 95% of adverse events being resolved or resolving by the end of the study. The incidence of adverse events was 46% in those receiving baloxavir and 53% in those receiving oseltamivir, a nonsignificant difference, with the most common adverse event in both groups being gastrointestinal disorders. No deaths, serious adverse events, or hospitalizations were reported, but two patients receiving oseltamivir discontinued because of adverse events.

The study was funded by F. Hoffmann-La Roche. Dr. Baker and a coauthor received funding through their institutions for the conduct of the study; several coauthors reported being employed by and owning stocks in F. Hoffmann–La Roche. One coauthor reported receiving consultancy fees from F. Hoffmann–La Roche and grants from Shionogi.

lfranki@mdedge.com

SOURCE: Baker J et al. Pediatr Infect Dis J. 2020 Jun 5. doi: 10.1097/INF.0000000000002747.

Oral baloxavir marboxil is effective and well tolerated at alleviating symptoms in otherwise healthy children with acute influenza, according to Jeffrey Baker, MD, of Clinical Research Prime, Idaho Falls, and associates.

In the double-blind, randomized, controlled MiniSTONE-2 phase 3 trial, the investigators randomized 112 children aged 1-12 years to baloxavir and 57 to oseltamivir. The predominant influenza A subtype was H3N2 for both groups, followed by H1N1pdm09. Demographics and baseline characteristics were similar between treatment groups, the investigators wrote in the Pediatric Infectious Disease Journal.

The time to alleviation of signs and symptoms was a median 138 hours for those receiving baloxavir and 150 hours for those receiving oseltamivir, a nonsignificant difference. Duration of fever and of all symptoms also were similar between groups, as was the time to return to normal health and activity.

A total of 122 adverse events were reported in 84 children, with 95% of adverse events being resolved or resolving by the end of the study. The incidence of adverse events was 46% in those receiving baloxavir and 53% in those receiving oseltamivir, a nonsignificant difference, with the most common adverse event in both groups being gastrointestinal disorders. No deaths, serious adverse events, or hospitalizations were reported, but two patients receiving oseltamivir discontinued because of adverse events.

The study was funded by F. Hoffmann-La Roche. Dr. Baker and a coauthor received funding through their institutions for the conduct of the study; several coauthors reported being employed by and owning stocks in F. Hoffmann–La Roche. One coauthor reported receiving consultancy fees from F. Hoffmann–La Roche and grants from Shionogi.

lfranki@mdedge.com

SOURCE: Baker J et al. Pediatr Infect Dis J. 2020 Jun 5. doi: 10.1097/INF.0000000000002747.

Oral baloxavir marboxil is effective and well tolerated at alleviating symptoms in otherwise healthy children with acute influenza, according to Jeffrey Baker, MD, of Clinical Research Prime, Idaho Falls, and associates.

In the double-blind, randomized, controlled MiniSTONE-2 phase 3 trial, the investigators randomized 112 children aged 1-12 years to baloxavir and 57 to oseltamivir. The predominant influenza A subtype was H3N2 for both groups, followed by H1N1pdm09. Demographics and baseline characteristics were similar between treatment groups, the investigators wrote in the Pediatric Infectious Disease Journal.

The time to alleviation of signs and symptoms was a median 138 hours for those receiving baloxavir and 150 hours for those receiving oseltamivir, a nonsignificant difference. Duration of fever and of all symptoms also were similar between groups, as was the time to return to normal health and activity.

A total of 122 adverse events were reported in 84 children, with 95% of adverse events being resolved or resolving by the end of the study. The incidence of adverse events was 46% in those receiving baloxavir and 53% in those receiving oseltamivir, a nonsignificant difference, with the most common adverse event in both groups being gastrointestinal disorders. No deaths, serious adverse events, or hospitalizations were reported, but two patients receiving oseltamivir discontinued because of adverse events.

The study was funded by F. Hoffmann-La Roche. Dr. Baker and a coauthor received funding through their institutions for the conduct of the study; several coauthors reported being employed by and owning stocks in F. Hoffmann–La Roche. One coauthor reported receiving consultancy fees from F. Hoffmann–La Roche and grants from Shionogi.

lfranki@mdedge.com

SOURCE: Baker J et al. Pediatr Infect Dis J. 2020 Jun 5. doi: 10.1097/INF.0000000000002747.

A second booster dose of the influenza vaccine in vaccine-naive children may significantly reduce their likelihood of getting the disease, new research suggests.

KatarzynaBialasiewicz/Thinkstock

Writing for JAMA Pediatrics, researchers reported on a case-control study of 7,533 children presenting to outpatient clinics – all in the U.S. Influenza Vaccine Effectiveness Network – with acute respiratory tract illnesses from 2014 to 2018. The study looked at the effectiveness of vaccination against laboratory-confirmed influenza.

Current U.S. guidelines recommend that children aged 6 months to 8 years receive two doses of the influenza vaccine initially – a priming dose and a booster dose – while those aged 9 years or older are considered to be ‘immunologically primed’ and therefore only require one annual dose.

The study found that 60% of the children had received two doses of the influenza vaccine during their first vaccination season, and 68% were first vaccinated before the current influenza season. Of those who had been vaccinated, 89% had received their first influenza vaccine dose when they were younger than 2 years.

Among the 2,140 children who were unvaccinated before the current influenza season, the 436 children who received two doses of the influenza vaccine had 43% lower odds of influenza compared with the 466 children who received one dose. The overall vaccine effectiveness among this vaccine-naive group aged under 2 years was 38%; for those who received two doses it was 53%, and for those who received one dose it was 23%.

“The higher risk of infection resulting from underdeveloped immune and respiratory tract systems provides a reason to identify vaccination strategies focusing on this vulnerable population of younger children,” wrote Jessie R. Chung, MPH, of the Influenza Division of the Centers for Disease Control and Prevention, and coauthors. “Promoting efforts to improve influenza vaccine coverage—particularly with 2 doses in the first vaccination season – may reduce the burden of influenza illness among young children, who are particularly vulnerable to complications and death from influenza infection.”

Overall 52% of children were unvaccinated for the current influenza season and 9% were partially vaccinated. Of those who were fully vaccinated for the current season, 83% had received one dose in the current season, and 17% had received two doses.

The authors found that full vaccination against any influenza was associated with a 22% lower odds of influenza compared with partial vaccination (95% confidence interval, 0.61-1.01), with partial vaccination defined as anything less than two doses of vaccine in the current season – at least 4 weeks apart – or two or more doses before the current season and one or more doses in the current season. However, even children who were only partially vaccinated still showed statistically significant vaccine effectiveness, except for those who received one dose of vaccine in the current season and were aged under 2 years.

“Compared with older children, young children, even if healthy, are at an elevated risk of influenza infection and influenza-associated complications, such as hospitalization,” the authors wrote. “One recent simulation study reported that even small improvements in either vaccine coverage or VE [vaccine effectiveness], and ideally both, may avert substantial amounts of influenza-associated illnesses, medical visits, and hospitalizations.”

The study also noted that children who had received only a single previous vaccine dose rarely received two doses in the current season.

In an accompanying editorial, Claire Abraham, MD, and Melissa S. Stockwell, MD, of Columbia University Medical Center, New York, wrote that modeling suggested that in the 2017-2018 influenza season, vaccination prevented 1.3 million cases of infection, 895,000 medical visits, 10,500 hospitalizations and 111 deaths in children aged under 5 years.

“This study highlights the importance of administering 2 doses of the influenza vaccine to children younger than 9 years for whom 2 doses are needed, and especially to vaccine naive children younger than 2 years,” they wrote.

But despite many studies showing the impact and importance of influenza vaccination, uptake of this vaccine remained lower than for other pediatric vaccines.

“This present study reemphasizes the need for further research exploring why families who are seemingly willing to vaccinate their children against influenza, as indicated by their receiving the first needed dose of influenza vaccine, find barriers to receiving all of the needed doses, placing their children at higher risk for contracting a potentially devastating virus.”

The U.S. Influenza Vaccine Effectiveness Network is funded by the CDC, and this project also received support from the National Institutes of Health. Eight authors declared grants from the CDC during the conduct of the study, and five declared grants and other funding from private industry outside the study.

SOURCE: Chung J et al. JAMA Pediatrics 2020 May 4. doi: 10.1001/jamapediatrics.2020.0372.

A second booster dose of the influenza vaccine in vaccine-naive children may significantly reduce their likelihood of getting the disease, new research suggests.

KatarzynaBialasiewicz/Thinkstock

Writing for JAMA Pediatrics, researchers reported on a case-control study of 7,533 children presenting to outpatient clinics – all in the U.S. Influenza Vaccine Effectiveness Network – with acute respiratory tract illnesses from 2014 to 2018. The study looked at the effectiveness of vaccination against laboratory-confirmed influenza.

Current U.S. guidelines recommend that children aged 6 months to 8 years receive two doses of the influenza vaccine initially – a priming dose and a booster dose – while those aged 9 years or older are considered to be ‘immunologically primed’ and therefore only require one annual dose.

The study found that 60% of the children had received two doses of the influenza vaccine during their first vaccination season, and 68% were first vaccinated before the current influenza season. Of those who had been vaccinated, 89% had received their first influenza vaccine dose when they were younger than 2 years.

Among the 2,140 children who were unvaccinated before the current influenza season, the 436 children who received two doses of the influenza vaccine had 43% lower odds of influenza compared with the 466 children who received one dose. The overall vaccine effectiveness among this vaccine-naive group aged under 2 years was 38%; for those who received two doses it was 53%, and for those who received one dose it was 23%.

“The higher risk of infection resulting from underdeveloped immune and respiratory tract systems provides a reason to identify vaccination strategies focusing on this vulnerable population of younger children,” wrote Jessie R. Chung, MPH, of the Influenza Division of the Centers for Disease Control and Prevention, and coauthors. “Promoting efforts to improve influenza vaccine coverage—particularly with 2 doses in the first vaccination season – may reduce the burden of influenza illness among young children, who are particularly vulnerable to complications and death from influenza infection.”

Overall 52% of children were unvaccinated for the current influenza season and 9% were partially vaccinated. Of those who were fully vaccinated for the current season, 83% had received one dose in the current season, and 17% had received two doses.

The authors found that full vaccination against any influenza was associated with a 22% lower odds of influenza compared with partial vaccination (95% confidence interval, 0.61-1.01), with partial vaccination defined as anything less than two doses of vaccine in the current season – at least 4 weeks apart – or two or more doses before the current season and one or more doses in the current season. However, even children who were only partially vaccinated still showed statistically significant vaccine effectiveness, except for those who received one dose of vaccine in the current season and were aged under 2 years.

“Compared with older children, young children, even if healthy, are at an elevated risk of influenza infection and influenza-associated complications, such as hospitalization,” the authors wrote. “One recent simulation study reported that even small improvements in either vaccine coverage or VE [vaccine effectiveness], and ideally both, may avert substantial amounts of influenza-associated illnesses, medical visits, and hospitalizations.”

The study also noted that children who had received only a single previous vaccine dose rarely received two doses in the current season.

In an accompanying editorial, Claire Abraham, MD, and Melissa S. Stockwell, MD, of Columbia University Medical Center, New York, wrote that modeling suggested that in the 2017-2018 influenza season, vaccination prevented 1.3 million cases of infection, 895,000 medical visits, 10,500 hospitalizations and 111 deaths in children aged under 5 years.

“This study highlights the importance of administering 2 doses of the influenza vaccine to children younger than 9 years for whom 2 doses are needed, and especially to vaccine naive children younger than 2 years,” they wrote.

But despite many studies showing the impact and importance of influenza vaccination, uptake of this vaccine remained lower than for other pediatric vaccines.

“This present study reemphasizes the need for further research exploring why families who are seemingly willing to vaccinate their children against influenza, as indicated by their receiving the first needed dose of influenza vaccine, find barriers to receiving all of the needed doses, placing their children at higher risk for contracting a potentially devastating virus.”

The U.S. Influenza Vaccine Effectiveness Network is funded by the CDC, and this project also received support from the National Institutes of Health. Eight authors declared grants from the CDC during the conduct of the study, and five declared grants and other funding from private industry outside the study.

SOURCE: Chung J et al. JAMA Pediatrics 2020 May 4. doi: 10.1001/jamapediatrics.2020.0372.

A second booster dose of the influenza vaccine in vaccine-naive children may significantly reduce their likelihood of getting the disease, new research suggests.

KatarzynaBialasiewicz/Thinkstock

Writing for JAMA Pediatrics, researchers reported on a case-control study of 7,533 children presenting to outpatient clinics – all in the U.S. Influenza Vaccine Effectiveness Network – with acute respiratory tract illnesses from 2014 to 2018. The study looked at the effectiveness of vaccination against laboratory-confirmed influenza.

Current U.S. guidelines recommend that children aged 6 months to 8 years receive two doses of the influenza vaccine initially – a priming dose and a booster dose – while those aged 9 years or older are considered to be ‘immunologically primed’ and therefore only require one annual dose.

The study found that 60% of the children had received two doses of the influenza vaccine during their first vaccination season, and 68% were first vaccinated before the current influenza season. Of those who had been vaccinated, 89% had received their first influenza vaccine dose when they were younger than 2 years.

Among the 2,140 children who were unvaccinated before the current influenza season, the 436 children who received two doses of the influenza vaccine had 43% lower odds of influenza compared with the 466 children who received one dose. The overall vaccine effectiveness among this vaccine-naive group aged under 2 years was 38%; for those who received two doses it was 53%, and for those who received one dose it was 23%.

“The higher risk of infection resulting from underdeveloped immune and respiratory tract systems provides a reason to identify vaccination strategies focusing on this vulnerable population of younger children,” wrote Jessie R. Chung, MPH, of the Influenza Division of the Centers for Disease Control and Prevention, and coauthors. “Promoting efforts to improve influenza vaccine coverage—particularly with 2 doses in the first vaccination season – may reduce the burden of influenza illness among young children, who are particularly vulnerable to complications and death from influenza infection.”

Overall 52% of children were unvaccinated for the current influenza season and 9% were partially vaccinated. Of those who were fully vaccinated for the current season, 83% had received one dose in the current season, and 17% had received two doses.

The authors found that full vaccination against any influenza was associated with a 22% lower odds of influenza compared with partial vaccination (95% confidence interval, 0.61-1.01), with partial vaccination defined as anything less than two doses of vaccine in the current season – at least 4 weeks apart – or two or more doses before the current season and one or more doses in the current season. However, even children who were only partially vaccinated still showed statistically significant vaccine effectiveness, except for those who received one dose of vaccine in the current season and were aged under 2 years.

“Compared with older children, young children, even if healthy, are at an elevated risk of influenza infection and influenza-associated complications, such as hospitalization,” the authors wrote. “One recent simulation study reported that even small improvements in either vaccine coverage or VE [vaccine effectiveness], and ideally both, may avert substantial amounts of influenza-associated illnesses, medical visits, and hospitalizations.”

The study also noted that children who had received only a single previous vaccine dose rarely received two doses in the current season.

In an accompanying editorial, Claire Abraham, MD, and Melissa S. Stockwell, MD, of Columbia University Medical Center, New York, wrote that modeling suggested that in the 2017-2018 influenza season, vaccination prevented 1.3 million cases of infection, 895,000 medical visits, 10,500 hospitalizations and 111 deaths in children aged under 5 years.

“This study highlights the importance of administering 2 doses of the influenza vaccine to children younger than 9 years for whom 2 doses are needed, and especially to vaccine naive children younger than 2 years,” they wrote.

But despite many studies showing the impact and importance of influenza vaccination, uptake of this vaccine remained lower than for other pediatric vaccines.

“This present study reemphasizes the need for further research exploring why families who are seemingly willing to vaccinate their children against influenza, as indicated by their receiving the first needed dose of influenza vaccine, find barriers to receiving all of the needed doses, placing their children at higher risk for contracting a potentially devastating virus.”

The U.S. Influenza Vaccine Effectiveness Network is funded by the CDC, and this project also received support from the National Institutes of Health. Eight authors declared grants from the CDC during the conduct of the study, and five declared grants and other funding from private industry outside the study.

SOURCE: Chung J et al. JAMA Pediatrics 2020 May 4. doi: 10.1001/jamapediatrics.2020.0372.

The 2019-2020 flu season is ending, but not without a revised map to reflect the COVID-induced new world order.

rfranki@mdedge.com

The 2019-2020 flu season is ending, but not without a revised map to reflect the COVID-induced new world order.

rfranki@mdedge.com

The 2019-2020 flu season is ending, but not without a revised map to reflect the COVID-induced new world order.

rfranki@mdedge.com

Influenza activity measures dropped during the week ending March 28, but the percentage of deaths attributed to pneumonia and influenza (P&I) has risen into epidemic territory, according to the Centers for Disease Control and Prevention.

This influenza news, however, needs to be viewed through a COVID-19 lens.

The P&I mortality data are reported together and are always a week behind the other measures, in this case covering the week ending March 21, but they show influenza deaths dropping to 0.8% as the overall P&I rate rose from 7.4% to 8.2%, a pneumonia-fueled increase that was “likely associated with COVID-19 rather than influenza,” the CDC’s influenza division noted.

The two main activity measures, at least, are on the same page for the first time since the end of February.

The rate of outpatient visits for influenza-like illness (ILI) had been dropping up to that point but then rose for an unprecedented third time this season, a change probably brought about by COVID-related health care–seeking behavior, the influenza division reported in its weekly FluView report.

This corresponding third drop in ILI activity brought the rate down to 5.4% this week from 6.2% the previous week, the CDC reported. The two previous high points occurred during the weeks ending Dec. 28 (7.0%) and Feb. 8 (6.7%)

The COVID-related changes, such as increased use of telemedicine and social distancing, “impact data from [the Outpatient Influenza-Like Illness Surveillance Network] in ways that are difficult to differentiate from changes in illness levels and should be interpreted with caution,” the CDC investigators noted.

The other activity measure, positive tests of respiratory specimens for influenza at clinical laboratories, continued the decline that started in mid-February by falling from 7.3% to 2.1%, its lowest rate since October, CDC data show.

Overall flu-related deaths may be down, but mortality in children continued at a near-record level. Seven such deaths were reported this past week, which brings the total for the 2019-2020 season to 162. “This number is higher than recorded at the same time in every season since reporting began in 2004-05, except for the 2009 pandemic,” the CDC noted.

rfranki@mdedge.com

Influenza activity measures dropped during the week ending March 28, but the percentage of deaths attributed to pneumonia and influenza (P&I) has risen into epidemic territory, according to the Centers for Disease Control and Prevention.

This influenza news, however, needs to be viewed through a COVID-19 lens.

The P&I mortality data are reported together and are always a week behind the other measures, in this case covering the week ending March 21, but they show influenza deaths dropping to 0.8% as the overall P&I rate rose from 7.4% to 8.2%, a pneumonia-fueled increase that was “likely associated with COVID-19 rather than influenza,” the CDC’s influenza division noted.

The two main activity measures, at least, are on the same page for the first time since the end of February.

The rate of outpatient visits for influenza-like illness (ILI) had been dropping up to that point but then rose for an unprecedented third time this season, a change probably brought about by COVID-related health care–seeking behavior, the influenza division reported in its weekly FluView report.

This corresponding third drop in ILI activity brought the rate down to 5.4% this week from 6.2% the previous week, the CDC reported. The two previous high points occurred during the weeks ending Dec. 28 (7.0%) and Feb. 8 (6.7%)

The COVID-related changes, such as increased use of telemedicine and social distancing, “impact data from [the Outpatient Influenza-Like Illness Surveillance Network] in ways that are difficult to differentiate from changes in illness levels and should be interpreted with caution,” the CDC investigators noted.

The other activity measure, positive tests of respiratory specimens for influenza at clinical laboratories, continued the decline that started in mid-February by falling from 7.3% to 2.1%, its lowest rate since October, CDC data show.

Overall flu-related deaths may be down, but mortality in children continued at a near-record level. Seven such deaths were reported this past week, which brings the total for the 2019-2020 season to 162. “This number is higher than recorded at the same time in every season since reporting began in 2004-05, except for the 2009 pandemic,” the CDC noted.

rfranki@mdedge.com

Influenza activity measures dropped during the week ending March 28, but the percentage of deaths attributed to pneumonia and influenza (P&I) has risen into epidemic territory, according to the Centers for Disease Control and Prevention.

This influenza news, however, needs to be viewed through a COVID-19 lens.

The P&I mortality data are reported together and are always a week behind the other measures, in this case covering the week ending March 21, but they show influenza deaths dropping to 0.8% as the overall P&I rate rose from 7.4% to 8.2%, a pneumonia-fueled increase that was “likely associated with COVID-19 rather than influenza,” the CDC’s influenza division noted.

The two main activity measures, at least, are on the same page for the first time since the end of February.

The rate of outpatient visits for influenza-like illness (ILI) had been dropping up to that point but then rose for an unprecedented third time this season, a change probably brought about by COVID-related health care–seeking behavior, the influenza division reported in its weekly FluView report.

This corresponding third drop in ILI activity brought the rate down to 5.4% this week from 6.2% the previous week, the CDC reported. The two previous high points occurred during the weeks ending Dec. 28 (7.0%) and Feb. 8 (6.7%)

The COVID-related changes, such as increased use of telemedicine and social distancing, “impact data from [the Outpatient Influenza-Like Illness Surveillance Network] in ways that are difficult to differentiate from changes in illness levels and should be interpreted with caution,” the CDC investigators noted.

The other activity measure, positive tests of respiratory specimens for influenza at clinical laboratories, continued the decline that started in mid-February by falling from 7.3% to 2.1%, its lowest rate since October, CDC data show.

Overall flu-related deaths may be down, but mortality in children continued at a near-record level. Seven such deaths were reported this past week, which brings the total for the 2019-2020 season to 162. “This number is higher than recorded at the same time in every season since reporting began in 2004-05, except for the 2009 pandemic,” the CDC noted.

rfranki@mdedge.com