polio vaccine

Polio

The Salk vaccine (inactivated polio vaccine, IPV) was developed by Dr. Jonas Salk in 1955. It consists of injection of dead (inactivated) polio virus. The Sabin vaccine (oral polio vaccine, OPV) was developed more recently. It is the most commonly used polio vaccine today. This vaccine contains weakened, live virus. It is a liquid that is given by mouth. The trivalent form (TOPV) is effective against all known forms of polio; ....