Who prepared the first effective vaccine against polio?

Question

The first Polio vaccine in form of 'injected dose' was developed by Jonas Salk in 1952. Later, who developed first Oral Polio Vaccine (OPV) in sixties ?

Answer 1

The first polio vaccine was the inactivated polio vaccine. It was developed by Jonas Salk and came into use in 1955. The oral polio vaccine was developed by Albert Sabin and came into commercial use in 1961.