Saraswathy, A. S., B. M. Veetil, and R. Jose. “COVID-19 Vaccine Breakthrough Infections Among Health Care Workers of a Tertiary Care Center in North Kerala: A Descriptive Study”. International Journal Of Community Medicine And Public Health, vol. 10, no. 11, Oct. 2023, pp. 4339-43, doi:10.18203/2394-6040.ijcmph20233474.