What is vaccine-derived polio?
healthy soch New Delhi, September 21, 2019: Oral polio vaccine (OPV) contains an attenuated (weakened) vaccine-virus, activating an immune response…
Dr. T S Kler Padma Bhushan Awardee
MD, DM, MRCP, FRCP(U.K), FACC, D.Sc
Chairman – Fortis Heart Institute Gurugram
Precautions to avoid Corona Virus: