[1]
A. S. Saraswathy, R. Sanya, and J. A. Kumaran, “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”, Int J Community Med Public Health, vol. 7, no. 12, pp. 5111–5114, Nov. 2020.