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- Title
Evolution of SARS-CoV-2 IgG Seroprevalence in Children and Factors Associated with Seroconversion: Results from a Multiple Time-Points Study in Friuli-Venezia Giulia Region, Italy.
- Authors
Lazzerini, Marzia; Benvenuto, Simone; Mariani, Ilaria; Fedele, Giorgio; Leone, Pasqualina; Stefanelli, Paola; Vittori, Giada; Schreiber, Silvana; Tommasini, Alberto; Rezza, Giovanni; Barbi, Egidio; Comar, Manola
- Abstract
Data on the effective burden of the SARS-CoV-2 pandemic in the pediatric population are limited. We aimed at assessing the prevalence of SARS-CoV-2 IgG antibodies in children at three subsequent time-points. The study was conducted between January 2021 and July 2021 among children referring to the Research Institute for Maternal and Child Health "Burlo Garofolo" in Trieste, a referral regional hospital in Friuli Venezia Giulia, Italy. A multivariate analysis was conducted to assess factors independently associated with seroconversion. A total of 594 children were included. Anti-SARS-CoV-2 trimeric Spike protein IgG antibodies were found in 32 (15.4%) children tested in April-May and in 20 (11.8%) in June–July 2021, compared with 24 (11.1%) of those tested in January–February 2021 (p = 0.37, Armitage exact test for trend over time p = 0.76). A subgroup analysis and a multivariate logistic regression analysis were performed considering sociodemographic, clinical, and historical variables. Three categories of children showed statistically significant increased odds of positive anti-SARS-CoV-2 IgG antibodies: children previously positive to a nasopharyngeal swab (AdjOR 15.41, 95%CI 3.44–69.04, p < 0.001), cohabitant with a person with an history of a previous positive nasopharyngeal swab (AdjOR 9.95, 95%CI 5.35–18.52, p < 0.001), and children with a foreign citizenship (AdjOR 2.4, 95%CI 1.05–5.70, p = 0.002). The study suggests that seroprevalence studies may be of limited help in estimating the prevalence of the COVID-19 pandemic in children. Further studies are needed to identify other markers of previous SARS-CoV-2 infection in children, such as CD4+ T cells or memory B-cells.
- Subjects
ITALY; IMMUNOGLOBULINS; COVID-19; VIRAL proteins; CROSS-sectional method; SEROCONVERSION; CORONAVIRUSES; DISEASE prevalence; SOCIODEMOGRAPHIC factors; COVID-19 pandemic; CITIZENSHIP; CHILDREN; ADOLESCENCE
- Publication
Children, 2022, Vol 9, Issue 2, p246
- ISSN
2227-9067
- Publication type
Article
- DOI
10.3390/children9020246