Jonas Salk in 1955.
Jonas Salk developed the first polio vaccine in 1952.
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.
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 a polio vaccine in the nineteen sixties.
Jonas Salk developed the first polio vaccine in 1952. It was a intradermal injection vaccine.
Jonas Salk developed the first vaccine in 1952.
Jonas Salk developed an inactivated virus polio vaccine in 1952 that was first used on people in 1955. Albert Sabin developed a live vaccine in 1958. It was the Sabin vaccine that was used to eliminate Polio around the world, but it was then removed from service because of its higher rate of induced disease.
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.
To protect against polio.
Jonas Salk in 1952
He developed the polio vaccine.
Jonas Salk