Katawa G, Tchopba CN, Tchadié PE, Simfele CH, Kamassa EH, Amessoudji MO, et al. Systematic Review on COVID-19 Vaccines: Comparative Study of AstraZeneca, Pfizer-BioNTech, Sputnik V, Johnson & Johnson, Moderna and Corona Vac. ijirms [Internet]. 2021 Nov. 12 [cited 2024 May 20];6(11):784-9. Available from: https://www.ijirms.in/index.php/ijirms/article/view/1250