Sarkar, Santana Rani, and Nitai Chandra Ray. “A Review of SARS-CoV-2 Vaccine Developmental Stages and Immunization Challenges”. Community Based Medical Journal 12, no. 1 (February 19, 2023): 129–135. Accessed November 23, 2024. https://banglajol.info/index.php/CBMJ/article/view/64397.