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12 apr 1955 anni - Polio Vaccine

Descrizione:

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.

Aggiunto al nastro di tempo:

U.S. History Timeline

ByTRACY DENNARD
3 mag 2023
0
0
224

Data:

12 apr 1955 anni
Adesso
~ 70 years ago

Immagini:

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