Evolution of SARS-CoV-2 seroprevalence and clusters in school children from June 2020 to April 2021: prospective cohort study Ciao Corona. Swiss Medical Weekly, [S. l.], v. 151, n. 4546, p. w30092, 2021. DOI: 10.4414/SMW.2021.w30092. Disponível em: https://www.smw.ch/index.php/smw/article/view/3106. Acesso em: 21 oct. 2025.