Khan, Sarfaraz Alam, and Nazeem Ishrat Siddiqui. “A Basic Insight into COVID-19 Vaccines: An Overview”. International Journal of Basic & Clinical Pharmacology 12, no. 4 (June 27, 2023): 626–630. Accessed October 23, 2025. https://www.ijbcp.com/index.php/ijbcp/article/view/5321.