The ability of younger children to spread COVID-19 may have been under-recognized given the rapid and sustained closure of schools and daycare during the pandemic. Image is in the public domain.
Summary: Children younger than five with mild-to-moderate coronavirus have might higher levels of genetic materials for the virus in their noses compared to older children and adults. The findings suggest young children as able to transmit COVID-19 to the same degree as those in other age groups.
Source: Ann & Robert H. Lurie Children’s Hospital of Chicago
A study from Ann & Robert H. Lurie Children’s Hospital of Chicago discovered that children younger than 5 years with mild to moderate COVID-19 have much higher levels of genetic material for the virus in the nose compared to older children and adults. Findings, published in JAMA Pediatrics, point to the possibility that the youngest children transmit the virus as much as other age groups. The ability of younger children to spread COVID-19 may have been under-recognized given the rapid and sustained closure of schools and daycare during the pandemic.
“We found that children under 5 with COVID-19 have a higher viral load than older children and adults, which may suggest greater transmission, as we see with respiratory syncytial virus, also known as RSV,” says lead author Taylor Heald-Sargent, MD, PhD, pediatric infectious diseases specialist at Lurie Children’s and Assistant Professor of Pediatrics at Northwestern University Feinberg School of Medicine. “This has important public health implications, especially during discussions on the safety of reopening schools and daycare.”
Dr. Heald-Sargent and colleagues analyzed 145 cases of mild to moderate COVID-19 illness within the first week of symptom onset. They compared the viral load in three age groups – children younger than 5 years, children 5-17 years and adults 18-65 years.
“Our study was not designed to prove that younger children spread COVID-19 as much as adults, but it is a possibility,” says Dr. Heald-Sargent. “We need to take that into account in efforts to reduce transmission as we continue to learn more about this virus.”
Age-Related Differences in Nasopharyngeal Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) Levels in Patients With Mild to Moderate Coronavirus Disease 2019 (COVID-19)
Children are susceptible to infection with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) but generally present with mild symptoms compared with adults.1 Children drive spread of respiratory and gastrointestinal illnesses in the population,2 but data on children as sources of SARS-CoV-2 spread are sparse.
Early reports did not find strong evidence of children as major contributors to SARS-CoV-2 spread,3 but school closures early in pandemic responses thwarted larger-scale investigations of schools as a source of community transmission. As public health systems look to reopen schools and day cares, understanding transmission potential in children will be important to guide public health measures. Here, we report that replication of SARS-CoV-2 in older children leads to similar levels of viral nucleic acid as adults, but significantly greater amounts of viral nucleic acid are detected in children younger than 5 years.