1. Hall, Victoria Jane; Foulks, Sarah et al. SARS-CoV-2 infection rates of antibody-positive compared with antibody-negative health-care workers in England: a large, multicentre, prospective cohort study (SIREN). The Lancet. Volume 397, Issue 10283, P1459-1469, April 17, 2021. Disponível em: CLIQUE AQUI 2. CDC. Centers for Disease Control and Prevention. COVID-19. Testing. EUA, 2021. Disponível em:...