SARASWATHY, A. S.; SANYA, R.; KUMARAN, J. A. Secondary attack rate of COVID-19: analysis of contacts of COVID-19 cases admitted in a tertiary care centre, Northern district of Kerala, India-a cross-sectional study. International Journal Of Community Medicine And Public Health, [S. l.], v. 7, n. 12, p. 5111–5114, 2020. DOI: 10.18203/2394-6040.ijcmph20205193. Disponível em: https://www.ijcmph.com/index.php/ijcmph/article/view/7145. Acesso em: 27 nov. 2025.