Increasing rate of anti-SARS-CoV-2 antibodies between the first and second waves of COVID-19 in São Paulo, Brazil: A cross-sectional blood donors-based study. Clinics, [S. l.], v. 77, p. 100016, 2022. DOI: 10.1016/j.clinsp.2022.100016. Disponível em: https://journals.usp.br/clinics/article/view/213286.. Acesso em: 9 jun. 2024.