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apr 12, 1955 - Polio Vaccine

Description:

Salk tested his experimental killed-virus vaccine on himself and his family in 1953, and a year later on 1.6 million children in Canada, Finland and the USA. The results were announced on 12 April 1955, and Salk's inactivated polio vaccine was licensed on the same day.

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U.S. History Timeline

ByTRACY DENNARD
3 May 2023
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Date:

apr 12, 1955
Now
~ 70 years ago

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