Question

who did first polio vaccine​

Answer 1

Answer:

In 1955, the campaign bore fruit when Dr Jonas Salk developed the first vaccine against polio – an injectable, inactivated polio vaccine. In 1961, Dr Albert Sabin developed a "live" oral polio vaccine (OPV) which rapidly became the vaccine of choice for most national immunization programmes globally.

Answer 2

ANSWER:

The first polio vaccine, known as inactivated poliovirus vaccine (IPV) , was developed in 1950s by American physician ,Jonas Salk