Question
who developed a vaccine to prevent polio?
Answers
Ms. Sue
http://en.wikipedia.org/wiki/Jonas_Salk
mathhater2192
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 1962, Sabin developed the oral polio vaccine, taken by mouth, and still used, at present.