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.
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
Albert Sabin founded the oral polio vaccine and the vaccine was licensed in 1962.
Jonas Salk developed the polio vaccine, known as the inactivated polio vaccine (IPV). The vaccine was used to prevent poliomyelitis, a highly infectious viral disease that can cause paralysis and, in severe cases, death.
He developed the polio vaccine.
Jonas Salk in 1952
Jonas Salk
Jonas Salk developed the polio vaccine. This does not cure polio but it does prevent it. Polio remains incurable.
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.