Article ; Online: Longitudinal Follow-up of Antibody Responses in Pediatric Patients With COVID-19 up to 9 Months After Infection.
The Pediatric infectious disease journal
2021 Volume 40, Issue 8, Page(s) e294–e299
Abstract: Introduction: Antibody response developed within 2-3 weeks after exposure to severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has been shown to decrease over time; however, there is limited data about antibody levels at 6 months or later ... ...
| Abstract | Introduction: Antibody response developed within 2-3 weeks after exposure to severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has been shown to decrease over time; however, there is limited data about antibody levels at 6 months or later postinfection, particularly in children. Materials and method: A prospective multicenter study was performed using 315 samples of 74 confirmed and 10 probable coronavirus disease 2019 pediatric cases. About 20% of these cases were classified as asymptomatic, 74% as mild/moderate and 6% as severe/critical. Patients were included if at least 2 samples were available. The antibody response was classified as either early-period or late-period (14 days-3 months and after 6 months, respectively) for IgG response whereas IgA response was tested on various time intervals, including as early as 4 days up to 3 months. Euroimmun Anti-SARS-CoV-2 IgG and IgA and Genscript SARS-CoV-2 Surrogate Virus Neutralization Kits were used for antibody detection. Results: There was no difference between the early-period and late-period IgG positivity (P = 0.1). However, the median IgG levels were 11.98 in the early periods and 4.05 in the late periods, with a significance of P < 0.001. Although the decrease in IgG levels was significant in asymptomatic and mild/moderate cases (P < 0.008 and P < 0.001, respectively), the decrease in severe/critical cases was moderate (P = 0.285). The sensitivity of the IgG after 15 days was higher than 94%, and the sensitivity of IgA was 88% on days 8-15. Conclusion: SARS-CoV-2 IgG antibody levels decreased after 6 months. The decrease was moderate in severe/critical cases. Overall, 95.8% of the patients remained positive up to 9 months after infection. Although the IgA response may be useful early on, the IgG response is useful after 14 days. |
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| MeSH term(s) | Adolescent ; Antibodies, Viral/biosynthesis ; Antibodies, Viral/immunology ; Antibody Formation ; COVID-19/immunology ; Child ; Child, Preschool ; Female ; Follow-Up Studies ; Humans ; Immunoglobulin A ; Immunoglobulin G/biosynthesis ; Immunoglobulin G/immunology ; Infant ; Longitudinal Studies ; Male ; Prospective Studies ; SARS-CoV-2/immunology |
| Chemical Substances | Antibodies, Viral ; Immunoglobulin A ; Immunoglobulin G |
| Language | English |
| Publishing date | 2021-07-07 |
| Publishing country | United States |
| Document type | Journal Article |
| ZDB-ID | 392481-6 |
| ISSN | 1532-0987 ; 0891-3668 |
| ISSN (online) | 1532-0987 |
| ISSN | 0891-3668 |
| DOI | 10.1097/INF.0000000000003199 |
| Database | MEDical Literature Analysis and Retrieval System OnLINE |
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