“Seroprevalence of COVID-19 among health care personnel at a tertiary care teaching hospital” . Journal of Pharmaceutical Negative Results, [S. l.], p. 1960–1969, 2023. DOI: 10.47750/pnr.2023.14.03.255. Disponível em: https://pnrjournal.com/index.php/home/article/view/8598.. Acesso em: 7 jun. 2026.