Ranjan, A. , Kumar, P. , Verma, M. , Singh, C. , Pandey, S. , Naik, B.N. , Nirala, S.K. and Rao, R. 2022. Role of BCG and Measles vaccination in protection against COVID-19 infection and severity of the disease: A pilot case-control study. National Journal of Community Medicine. 13, 02 (Feb. 2022), 108–113. DOI:https://doi.org/10.55489/njcm1322022160.