IJSR International Journal of Scientific Research 2277 - 8179 Indian Society for Health and Advanced Research ijsr-12-1-45623 Original Research Paper A Study On Adverse Events Following Immunization Related To Covishield Vaccine Within 28 Days Among General Population In Northern Kerala Manju Thandayan Lakshmanan Dr. Dr. Jayasree Anandabhavan Kumaran Dr. January 2023 12 1 01 02