Ray, Shomik, Alka Singh, and Ranjana Singh. “Assessment of Relative Efficiency of COVID-19 Vaccines Granted Emergency Use Authorization in India and Their Respective Modes of Delivery-an Economic Evaluation”. International Journal Of Community Medicine And Public Health 10, no. 10 (September 30, 2023): 3822–3831. Accessed October 27, 2025. https://www.ijcmph.com/index.php/ijcmph/article/view/11443.