Seroprevalence of IgG and IgM anti-SARS-CoV-2 among voluntary blood donors in Rio de Janeiro, Brazil. SciELO Preprints, 2020. DOI: 10.1590/SciELOPreprints.404. Disponível em: https://preprints.scielo.org/index.php/scielo/preprint/view/404. Acesso em: 11 fev. 2026.