The main difference between the oral polio vaccine (OPV) and inactivated vaccine (injected polio vaccine, or IPV) is that the former uses a weakened virus that induces strong immunity in the ...

an attenuated live virus vaccine delivered orally (Sabin or OPV) and an inactivated virus vaccine delivered by injection (Salk or IPV). Both vaccines have been widely and successfully used to the ...

Oral polio vaccine (OPV) has been an effective strategy since it was initiated almost five decades ago. However, concern regarding its collateral effects has been increasing in recent years among ...

Our job is to paint pictures and solve problems while learning ... the proposition boils down to whether the oral polio vaccine (OPV) preparations used by Hilary Koprowski—then director of ...