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12 abr 1955 ano - Polio Vaccine

Descrição:

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.

Adicionado na linha do tempo:

U.S. History Timeline

ByTRACY DENNARD
3 mai 2023
0
0
224

Data:

12 abr 1955 ano
Agora
~ 70 years ago

Imagens:

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