Saraswathy, Anitha Subhadra, Bindu Meethale Veetil, and Rani 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 10, no. 11 (October 31, 2023): 4339–4343. Accessed October 25, 2025. https://www.ijcmph.com/index.php/ijcmph/article/view/11727.