A recent study titled Severe Acute Respiratory Syndrome Coronavirus 2 Antibody Prevalence and Associated Risk Factors in a Large Cohort of US Children explores the prevalence of SARS-CoV-2 antibodies in unvaccinated children aged 18 months to 11 years and examines the risk factors associated with antibody positivity. The research, conducted between August 2022 and June 2023 in Northern and Central New Jersey, involved 870 children who underwent oral fluid testing for SARS-CoV-2 antibodies, with caregivers completing detailed surveys. The study was published in Open Forum Infectious Diseases, Volume 12, Issue 1, January 2025, and can be accessed via DOI: 10.1093/ofid/ofae680.
The findings revealed that 68% of the children tested positive for SARS-CoV-2 antibodies, indicating prior infection. Key demographic factors influenced the likelihood of antibody positivity, with children from Hispanic and non-Hispanic Black communities being more likely to test positive compared to their White counterparts. The study also found that children enrolled later in the study period had a higher likelihood of testing positive, reflecting a higher prevalence of SARS-CoV-2 infections as the pandemic progressed.
In addition to demographic factors, the research highlighted the role of household vaccination status in mitigating the risk of infection. Children living in households with at least one vaccinated adult were 52% less likely to test positive for antibodies compared to those in households with no vaccinated adults. This suggests that adult vaccination may help reduce household transmission of SARS-CoV-2, offering an added layer of protection for children.
In conclusion, this study underscores the ongoing burden of SARS-CoV-2 infections among children and emphasizes the importance of adult vaccination in reducing the risk of infection in households. The findings suggest that increasing adult vaccination rates could play a critical role in protecting children from COVID-19, particularly during periods of heightened infection.
Recognition: Katic BJ, Katragkou A, Alvitres JL, Gurumurthy M, Li C, Schwab JV, Hasan UN, Gaur S, Weller AS, Kennedy MC, DiPentima C, Rohan C, Richlin B, Chu D, Otero I, Patel A, Thomas P, Friedman SM. SARS-CoV-2 Antibody Prevalence and Associated Risk Factors in a Large Cohort of Children in the United States. Open Forum Infect Dis. 2025 Jan 10;12(1):ofae680. doi: 10.1093/ofid/ofae680. PMID: 39802208; PMCID: PMC11718515.