Sathian, Brijesh, Mohammad Asim, Indrajit Banerjee, Bedanta Roy, Ana Beatriz Pizarro, Maraeh Angela Mancha, Edwin R. van Teijlingen, Hamed Kord Varkaneh, Ahammed Abdulla Mekkodathil, Supram Hosuru Subramanya, Israel Júnior Borges do Nascimento, Neema Antony, Ritesh G Menezes, Padam Simkhada, and Hanadi Al Hamad. “Development and Implementation of a Potential Coronavirus Disease 2019 (COVID-19) Vaccine: A Systematic Review and Meta-Analysis of Vaccine Clinical Trials”. Nepal Journal of Epidemiology 11, no. 1 (March 31, 2021): 959–982. Accessed January 25, 2022. https://www.nepjol.info/index.php/NJE/article/view/36163.