In the 1950s, Salk developed the first polio vaccine, an injection.
In 1962, Sabin developed the oral polio vaccine, taken by mouth, and still used, at present.
In 1952, Jonas Salk tested the first vaccine for polio.
Jonas salk
Jonas Salk
Jonas Salk
Jonas Salk.
jonas salk
Dr. Jonas Salk
Jonas Salk developed the first polio vaccine in 1952.
I think that polio was virulent before 1955 when the vaccine was developed. Now, I think, since we have developed a vaccine, it isn't as virulent.
Jonas Salk
Jonas Salk in 1952
He developed the polio vaccine.
Jonas Salk
1950's The first polio vaccine, called the Salk vaccine, was developed by Jonas Salk and became available in 1955. In 1962 the Sabin or oral vaccine developed by Albert Sabin became available.
Jonas Salk developed the polio vaccine. This does not cure polio but it does prevent it. Polio remains incurable.
Jonas Salk developed a polio vaccine in the nineteen sixties.
Jonas Salk in 1955.
He developed the Polio Vaccine