Estimating the Prevalence of Adverse Effects Following Immunization (AEFI) With Covid-19 Vaccination and to Determine Association of AEFI With Blood Grouping Among Population of South-West Delhi, India: A Descriptive Cross-Sectional study.: To Estimate Prevalence of Adverse Effects Following Covid-19 Vaccination and Their Association With ABO-Rh Blood Grouping If Any. Int. J. of Res. in Pharmacology &Pharmacotherapeutics 2022, 11 (3), 135-140. https://doi.org/10.61096/ijrpp.v11.iss3.2022.135-140.