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Vaccine-preventable infection risk high for pediatric hematopoietic cell transplantation recipients
Vaccine-preventable infections (VPIs) in pediatric hematopoietic cell transplantation (HCT) recipients cause significant morbidity, health care burden, and mortality.
Dana Danino, MD, and colleagues presented their evaluation of the prevalence and epidemiology of pediatric VPI-associated hospitalizations occurring within 5 years post HCT at the annual meeting of the European Society for Paediatric Infectious Diseases, held virtually this year.
“Pediatric HCT recipients are at increased risk of VPIs, and HCT recipients have poor outcomes from VPIs, compared with the general population,” explained Dr. Danino, of the department of pediatrics, and divisions of infectious diseases and host defense at the Ohio State University, Columbus. “However, the contemporary prevalence, risk factors, morbidity and mortality resulting from VPIs in children post HCT are not well known.”
Their epidemiological study, using the Pediatric Health Information System (PHIS) database, identified all children under 18 years that underwent allogeneic or autologous HCT in an 8-year period. A total of 9,591 unique HCT recipients were identified.
The researchers demonstrated that 7.1% of this cohort were hospitalized for a VPI in the first 5 years post HCT. Dr. Danino explained that 67% of VPI hospitalizations occurred during the first year, at a median of 222 days, and 22% of VPIs occurred during the initial HCT admission.
As to the type of infection, Dr. Danino and colleagues found that, the prevalence of VPI hospitalizations were highest for influenza, followed by varicella and invasive pneumococcal infections. They identified no hospitalizations due to measles or rubella during the study period.
The study findings revealed that the influenza infections occurred a median 231 days post HCT; varicella infections occurred a median 190 days; and invasive pneumococcal infections occurred a median 311 days post HCT.
“When we did a multivariate analysis by time post HCT, we found that age at transplantation, primary immune deficiency as an indication for transplantation, and graft versus host disease were independent predictors of VPIs during the initial HCT admission,” said Dr. Danino.
Children with a VPI who spent longer in hospital were more likely to be admitted to an ICU and have higher mortality, compared with children without a VPI diagnosis.
“VPIs led to longer duration of hospitalization, higher rates of ICU admission, and higher mortality, compared to HCT recipients without VPIs,” Dr. Danino explained. It was not possible in this retrospective study to determine whether increased mortality was VPI related.
These results underline the seriousness of infections in vulnerable children after HCT. Dr. Danino concluded by saying that “efforts to optimize vaccination strategies early post HCT are warranted to decrease VPIs.”
Dr. Danino had nothing to disclose.
Vaccine-preventable infections (VPIs) in pediatric hematopoietic cell transplantation (HCT) recipients cause significant morbidity, health care burden, and mortality.
Dana Danino, MD, and colleagues presented their evaluation of the prevalence and epidemiology of pediatric VPI-associated hospitalizations occurring within 5 years post HCT at the annual meeting of the European Society for Paediatric Infectious Diseases, held virtually this year.
“Pediatric HCT recipients are at increased risk of VPIs, and HCT recipients have poor outcomes from VPIs, compared with the general population,” explained Dr. Danino, of the department of pediatrics, and divisions of infectious diseases and host defense at the Ohio State University, Columbus. “However, the contemporary prevalence, risk factors, morbidity and mortality resulting from VPIs in children post HCT are not well known.”
Their epidemiological study, using the Pediatric Health Information System (PHIS) database, identified all children under 18 years that underwent allogeneic or autologous HCT in an 8-year period. A total of 9,591 unique HCT recipients were identified.
The researchers demonstrated that 7.1% of this cohort were hospitalized for a VPI in the first 5 years post HCT. Dr. Danino explained that 67% of VPI hospitalizations occurred during the first year, at a median of 222 days, and 22% of VPIs occurred during the initial HCT admission.
As to the type of infection, Dr. Danino and colleagues found that, the prevalence of VPI hospitalizations were highest for influenza, followed by varicella and invasive pneumococcal infections. They identified no hospitalizations due to measles or rubella during the study period.
The study findings revealed that the influenza infections occurred a median 231 days post HCT; varicella infections occurred a median 190 days; and invasive pneumococcal infections occurred a median 311 days post HCT.
“When we did a multivariate analysis by time post HCT, we found that age at transplantation, primary immune deficiency as an indication for transplantation, and graft versus host disease were independent predictors of VPIs during the initial HCT admission,” said Dr. Danino.
Children with a VPI who spent longer in hospital were more likely to be admitted to an ICU and have higher mortality, compared with children without a VPI diagnosis.
“VPIs led to longer duration of hospitalization, higher rates of ICU admission, and higher mortality, compared to HCT recipients without VPIs,” Dr. Danino explained. It was not possible in this retrospective study to determine whether increased mortality was VPI related.
These results underline the seriousness of infections in vulnerable children after HCT. Dr. Danino concluded by saying that “efforts to optimize vaccination strategies early post HCT are warranted to decrease VPIs.”
Dr. Danino had nothing to disclose.
Vaccine-preventable infections (VPIs) in pediatric hematopoietic cell transplantation (HCT) recipients cause significant morbidity, health care burden, and mortality.
Dana Danino, MD, and colleagues presented their evaluation of the prevalence and epidemiology of pediatric VPI-associated hospitalizations occurring within 5 years post HCT at the annual meeting of the European Society for Paediatric Infectious Diseases, held virtually this year.
“Pediatric HCT recipients are at increased risk of VPIs, and HCT recipients have poor outcomes from VPIs, compared with the general population,” explained Dr. Danino, of the department of pediatrics, and divisions of infectious diseases and host defense at the Ohio State University, Columbus. “However, the contemporary prevalence, risk factors, morbidity and mortality resulting from VPIs in children post HCT are not well known.”
Their epidemiological study, using the Pediatric Health Information System (PHIS) database, identified all children under 18 years that underwent allogeneic or autologous HCT in an 8-year period. A total of 9,591 unique HCT recipients were identified.
The researchers demonstrated that 7.1% of this cohort were hospitalized for a VPI in the first 5 years post HCT. Dr. Danino explained that 67% of VPI hospitalizations occurred during the first year, at a median of 222 days, and 22% of VPIs occurred during the initial HCT admission.
As to the type of infection, Dr. Danino and colleagues found that, the prevalence of VPI hospitalizations were highest for influenza, followed by varicella and invasive pneumococcal infections. They identified no hospitalizations due to measles or rubella during the study period.
The study findings revealed that the influenza infections occurred a median 231 days post HCT; varicella infections occurred a median 190 days; and invasive pneumococcal infections occurred a median 311 days post HCT.
“When we did a multivariate analysis by time post HCT, we found that age at transplantation, primary immune deficiency as an indication for transplantation, and graft versus host disease were independent predictors of VPIs during the initial HCT admission,” said Dr. Danino.
Children with a VPI who spent longer in hospital were more likely to be admitted to an ICU and have higher mortality, compared with children without a VPI diagnosis.
“VPIs led to longer duration of hospitalization, higher rates of ICU admission, and higher mortality, compared to HCT recipients without VPIs,” Dr. Danino explained. It was not possible in this retrospective study to determine whether increased mortality was VPI related.
These results underline the seriousness of infections in vulnerable children after HCT. Dr. Danino concluded by saying that “efforts to optimize vaccination strategies early post HCT are warranted to decrease VPIs.”
Dr. Danino had nothing to disclose.
FROM ESPID 2020
Children and school during the pandemic: What’s the answer?
Countries across the world are in the process of closing and reopening schools to contain the spread of COVID-19. Should there be universal testing and quarantining of sick school children and their classmates?
In a lively debate at the annual meeting of the European Society for Paediatric Infectious Diseases, held virtually this year, Andreea M. Panciu, MD, from the National Institute of Infectious Diseases in Bucharest, argued for routine testing and quarantining of all school children. Her opposite number, Danilo Buonsenso, MD, from the Centre for Global Health Research and Studies, Fondazione Policlinico Universitario Agostino Gemelli Istituto di Ricovero e Cura a Carattere Scientifico, Rome, made the case for a more selective approach.
Should children be sent to school?
stated Dr. Panciu as she started the debate by explaining the challenges faced by schools in adhering to key mitigation strategies. The U.S. Centers for Disease Control and Prevention recommends that students keep 1.8 m (6 feet) distance from one another. “In many school settings this is not feasible without drastically limiting the number of students,” she explained. “This is a massive challenge for many schools that are already overcrowded.”
The use of facemasks also is a challenge in classrooms. Children have a lower tolerance or may not be able to use the mask properly. There also are concerns regarding impaired learning, speech development, social development, and facial recognition. “We need to look at the evidence; preventive measures work,” responded Dr. Buonsenso. If distance can be implemented, the more distance the lower the transmission of infection, with 1.5-2 meters having the best effects. “Distance can be difficult when school buildings do not allow it, however, governments have had time to plan, and this should not be a limitation to education for kids.”
A recent review clearly showed that children and adolescents aged under 20 years have a much lower risk of susceptibility to COVID-19 infection, compared with adults. This is especially the case for children younger than 14 years. “There is no excuse, let’s bring the children back to school,” argued Dr. Buonsenso.
Dr. Panciu responded with several studies that have tried to quantify the amount of SARS-CoV-2 virus that is carried by infected children. Viral load in the nasopharynx in children under 5 years with mild to moderate COVID-19 symptoms was higher than that of both children over 5 as well as adults. The viral load in young children did not seem to differ by age or symptom severity. “There doesn’t appear to be a significant difference in viral load between symptomatic children and symptomatic adults,” she stated.
“But the question is: ‘How infectious are children?’ ” reacted Dr. Buonsenso. Data from South Korea showed that, for children, particularly those under 10 years, the number of secondary cases of contacts was very low, suggesting that children are rarely spreading the virus.
Dr. Buonsenso and colleagues assessed 30 households containing children aged under 18 years where an adult had been infected with COVID-19 in Rome during the peak of the pandemic. In no cases was it found that a child was the index case. This was supported by data from China, also obtained during the peak of the pandemic, which showed that the number of children infected was very low, but more importantly the number of secondary attacks from contact with children was also very low.
What about children who are sick at school?
The debate moved to discussing what should be done when a child is sick at school. Dr. Panciu clarified recommendations by the CDC regarding what steps to take if a student displays signs of infection consistent with COVID-19: Should they test positive, they are to stay at home for 10 days from the time signs and symptoms first appeared. Further, any teachers or students identified as close contacts are advised to stay at home for 14 days. (Since the ESPID meeting, the CDC has made changes in quarantine times for COVID-19. People can now quarantine for 10 days without a COVID-19 test if they have no symptoms. Alternatively, a quarantine can end after 7 days for someone with a negative test and no symptoms. The agency recommends a polymerase chain reaction test or an antigen assay within 48 hours before the end of a quarantine.)
A significant problem is the overlap between COVID-19 symptoms and those associated with other common illnesses because of a range of viruses. This is particularly true in younger children who often suffer from viral infections. “It is common for children to have up to eight respiratory illnesses a year,” explained Dr. Panciu, “and some may have symptoms so mild that they don’t notice them.”
“We need to be a little bit more children focused, otherwise we are going to be isolating children all the time,” said Dr. Buonsenso. The Royal College of Paediatrics and Child Health state that a child with a simple runny nose or sporadic cough without a fever, who would have attended school in other times, should not be tested for COVID-19. He moved on to then cite several studies that show little or no evidence of COVID-19 transmission between school children. This included a prospective cohort study in Australia showing that child-to-child transmission occurred in 0.3%. “To date, the advantages from routine quarantine and over testing seem too low to balance the social consequences on children and families,” he concluded.
As the debate drew to a close, Dr. Panciu reported several studies that did demonstrate transmission between school-age children. Data from an overnight camp in Georgia where the median age was 12 years showed the attack rate was 44% for ages 11-17 years and 51% for ages 6-10 years. Similar conclusions were reached in an Israeli study looking at a large COVID-19 outbreak in a school. This occurred 10 days after reopening, in spite of preventive measures being in place. “Opening safely isn’t just about the adjustments a school makes,” she said, “it’s also about how much of the virus is circulating in the community, which affects the likelihood that students and staff will bring COVID-19 into their classrooms.”
Damian Roland, consultant and honorary associate professor in pediatric emergency medicine at the University of Leicester (England), commented: “Maximizing educational potential while reducing the spread of COVID19 is a challenge laden with scientific equipoise while simultaneously infused with emotion. The evidence of transmission between, and infectivity from, children is not complete, as this debate has demonstrated. It is important scientists, clinicians, educators, and policy makers make collaborative decisions, aware there is not one perfect answer, and willing to understand and incorporate others views and objectives rather than holding onto single beliefs or approaches.”
No financial conflicts of interest were declared.
Countries across the world are in the process of closing and reopening schools to contain the spread of COVID-19. Should there be universal testing and quarantining of sick school children and their classmates?
In a lively debate at the annual meeting of the European Society for Paediatric Infectious Diseases, held virtually this year, Andreea M. Panciu, MD, from the National Institute of Infectious Diseases in Bucharest, argued for routine testing and quarantining of all school children. Her opposite number, Danilo Buonsenso, MD, from the Centre for Global Health Research and Studies, Fondazione Policlinico Universitario Agostino Gemelli Istituto di Ricovero e Cura a Carattere Scientifico, Rome, made the case for a more selective approach.
Should children be sent to school?
stated Dr. Panciu as she started the debate by explaining the challenges faced by schools in adhering to key mitigation strategies. The U.S. Centers for Disease Control and Prevention recommends that students keep 1.8 m (6 feet) distance from one another. “In many school settings this is not feasible without drastically limiting the number of students,” she explained. “This is a massive challenge for many schools that are already overcrowded.”
The use of facemasks also is a challenge in classrooms. Children have a lower tolerance or may not be able to use the mask properly. There also are concerns regarding impaired learning, speech development, social development, and facial recognition. “We need to look at the evidence; preventive measures work,” responded Dr. Buonsenso. If distance can be implemented, the more distance the lower the transmission of infection, with 1.5-2 meters having the best effects. “Distance can be difficult when school buildings do not allow it, however, governments have had time to plan, and this should not be a limitation to education for kids.”
A recent review clearly showed that children and adolescents aged under 20 years have a much lower risk of susceptibility to COVID-19 infection, compared with adults. This is especially the case for children younger than 14 years. “There is no excuse, let’s bring the children back to school,” argued Dr. Buonsenso.
Dr. Panciu responded with several studies that have tried to quantify the amount of SARS-CoV-2 virus that is carried by infected children. Viral load in the nasopharynx in children under 5 years with mild to moderate COVID-19 symptoms was higher than that of both children over 5 as well as adults. The viral load in young children did not seem to differ by age or symptom severity. “There doesn’t appear to be a significant difference in viral load between symptomatic children and symptomatic adults,” she stated.
“But the question is: ‘How infectious are children?’ ” reacted Dr. Buonsenso. Data from South Korea showed that, for children, particularly those under 10 years, the number of secondary cases of contacts was very low, suggesting that children are rarely spreading the virus.
Dr. Buonsenso and colleagues assessed 30 households containing children aged under 18 years where an adult had been infected with COVID-19 in Rome during the peak of the pandemic. In no cases was it found that a child was the index case. This was supported by data from China, also obtained during the peak of the pandemic, which showed that the number of children infected was very low, but more importantly the number of secondary attacks from contact with children was also very low.
What about children who are sick at school?
The debate moved to discussing what should be done when a child is sick at school. Dr. Panciu clarified recommendations by the CDC regarding what steps to take if a student displays signs of infection consistent with COVID-19: Should they test positive, they are to stay at home for 10 days from the time signs and symptoms first appeared. Further, any teachers or students identified as close contacts are advised to stay at home for 14 days. (Since the ESPID meeting, the CDC has made changes in quarantine times for COVID-19. People can now quarantine for 10 days without a COVID-19 test if they have no symptoms. Alternatively, a quarantine can end after 7 days for someone with a negative test and no symptoms. The agency recommends a polymerase chain reaction test or an antigen assay within 48 hours before the end of a quarantine.)
A significant problem is the overlap between COVID-19 symptoms and those associated with other common illnesses because of a range of viruses. This is particularly true in younger children who often suffer from viral infections. “It is common for children to have up to eight respiratory illnesses a year,” explained Dr. Panciu, “and some may have symptoms so mild that they don’t notice them.”
“We need to be a little bit more children focused, otherwise we are going to be isolating children all the time,” said Dr. Buonsenso. The Royal College of Paediatrics and Child Health state that a child with a simple runny nose or sporadic cough without a fever, who would have attended school in other times, should not be tested for COVID-19. He moved on to then cite several studies that show little or no evidence of COVID-19 transmission between school children. This included a prospective cohort study in Australia showing that child-to-child transmission occurred in 0.3%. “To date, the advantages from routine quarantine and over testing seem too low to balance the social consequences on children and families,” he concluded.
As the debate drew to a close, Dr. Panciu reported several studies that did demonstrate transmission between school-age children. Data from an overnight camp in Georgia where the median age was 12 years showed the attack rate was 44% for ages 11-17 years and 51% for ages 6-10 years. Similar conclusions were reached in an Israeli study looking at a large COVID-19 outbreak in a school. This occurred 10 days after reopening, in spite of preventive measures being in place. “Opening safely isn’t just about the adjustments a school makes,” she said, “it’s also about how much of the virus is circulating in the community, which affects the likelihood that students and staff will bring COVID-19 into their classrooms.”
Damian Roland, consultant and honorary associate professor in pediatric emergency medicine at the University of Leicester (England), commented: “Maximizing educational potential while reducing the spread of COVID19 is a challenge laden with scientific equipoise while simultaneously infused with emotion. The evidence of transmission between, and infectivity from, children is not complete, as this debate has demonstrated. It is important scientists, clinicians, educators, and policy makers make collaborative decisions, aware there is not one perfect answer, and willing to understand and incorporate others views and objectives rather than holding onto single beliefs or approaches.”
No financial conflicts of interest were declared.
Countries across the world are in the process of closing and reopening schools to contain the spread of COVID-19. Should there be universal testing and quarantining of sick school children and their classmates?
In a lively debate at the annual meeting of the European Society for Paediatric Infectious Diseases, held virtually this year, Andreea M. Panciu, MD, from the National Institute of Infectious Diseases in Bucharest, argued for routine testing and quarantining of all school children. Her opposite number, Danilo Buonsenso, MD, from the Centre for Global Health Research and Studies, Fondazione Policlinico Universitario Agostino Gemelli Istituto di Ricovero e Cura a Carattere Scientifico, Rome, made the case for a more selective approach.
Should children be sent to school?
stated Dr. Panciu as she started the debate by explaining the challenges faced by schools in adhering to key mitigation strategies. The U.S. Centers for Disease Control and Prevention recommends that students keep 1.8 m (6 feet) distance from one another. “In many school settings this is not feasible without drastically limiting the number of students,” she explained. “This is a massive challenge for many schools that are already overcrowded.”
The use of facemasks also is a challenge in classrooms. Children have a lower tolerance or may not be able to use the mask properly. There also are concerns regarding impaired learning, speech development, social development, and facial recognition. “We need to look at the evidence; preventive measures work,” responded Dr. Buonsenso. If distance can be implemented, the more distance the lower the transmission of infection, with 1.5-2 meters having the best effects. “Distance can be difficult when school buildings do not allow it, however, governments have had time to plan, and this should not be a limitation to education for kids.”
A recent review clearly showed that children and adolescents aged under 20 years have a much lower risk of susceptibility to COVID-19 infection, compared with adults. This is especially the case for children younger than 14 years. “There is no excuse, let’s bring the children back to school,” argued Dr. Buonsenso.
Dr. Panciu responded with several studies that have tried to quantify the amount of SARS-CoV-2 virus that is carried by infected children. Viral load in the nasopharynx in children under 5 years with mild to moderate COVID-19 symptoms was higher than that of both children over 5 as well as adults. The viral load in young children did not seem to differ by age or symptom severity. “There doesn’t appear to be a significant difference in viral load between symptomatic children and symptomatic adults,” she stated.
“But the question is: ‘How infectious are children?’ ” reacted Dr. Buonsenso. Data from South Korea showed that, for children, particularly those under 10 years, the number of secondary cases of contacts was very low, suggesting that children are rarely spreading the virus.
Dr. Buonsenso and colleagues assessed 30 households containing children aged under 18 years where an adult had been infected with COVID-19 in Rome during the peak of the pandemic. In no cases was it found that a child was the index case. This was supported by data from China, also obtained during the peak of the pandemic, which showed that the number of children infected was very low, but more importantly the number of secondary attacks from contact with children was also very low.
What about children who are sick at school?
The debate moved to discussing what should be done when a child is sick at school. Dr. Panciu clarified recommendations by the CDC regarding what steps to take if a student displays signs of infection consistent with COVID-19: Should they test positive, they are to stay at home for 10 days from the time signs and symptoms first appeared. Further, any teachers or students identified as close contacts are advised to stay at home for 14 days. (Since the ESPID meeting, the CDC has made changes in quarantine times for COVID-19. People can now quarantine for 10 days without a COVID-19 test if they have no symptoms. Alternatively, a quarantine can end after 7 days for someone with a negative test and no symptoms. The agency recommends a polymerase chain reaction test or an antigen assay within 48 hours before the end of a quarantine.)
A significant problem is the overlap between COVID-19 symptoms and those associated with other common illnesses because of a range of viruses. This is particularly true in younger children who often suffer from viral infections. “It is common for children to have up to eight respiratory illnesses a year,” explained Dr. Panciu, “and some may have symptoms so mild that they don’t notice them.”
“We need to be a little bit more children focused, otherwise we are going to be isolating children all the time,” said Dr. Buonsenso. The Royal College of Paediatrics and Child Health state that a child with a simple runny nose or sporadic cough without a fever, who would have attended school in other times, should not be tested for COVID-19. He moved on to then cite several studies that show little or no evidence of COVID-19 transmission between school children. This included a prospective cohort study in Australia showing that child-to-child transmission occurred in 0.3%. “To date, the advantages from routine quarantine and over testing seem too low to balance the social consequences on children and families,” he concluded.
As the debate drew to a close, Dr. Panciu reported several studies that did demonstrate transmission between school-age children. Data from an overnight camp in Georgia where the median age was 12 years showed the attack rate was 44% for ages 11-17 years and 51% for ages 6-10 years. Similar conclusions were reached in an Israeli study looking at a large COVID-19 outbreak in a school. This occurred 10 days after reopening, in spite of preventive measures being in place. “Opening safely isn’t just about the adjustments a school makes,” she said, “it’s also about how much of the virus is circulating in the community, which affects the likelihood that students and staff will bring COVID-19 into their classrooms.”
Damian Roland, consultant and honorary associate professor in pediatric emergency medicine at the University of Leicester (England), commented: “Maximizing educational potential while reducing the spread of COVID19 is a challenge laden with scientific equipoise while simultaneously infused with emotion. The evidence of transmission between, and infectivity from, children is not complete, as this debate has demonstrated. It is important scientists, clinicians, educators, and policy makers make collaborative decisions, aware there is not one perfect answer, and willing to understand and incorporate others views and objectives rather than holding onto single beliefs or approaches.”
No financial conflicts of interest were declared.
FROM ESPID 2020