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12 Apr 1955 Jahr - Polio Vaccine

Beschreibung:

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.

Zugefügt zum Band der Zeit:

U.S. History Timeline

ByTRACY DENNARD
3 Mai 2023
0
0
224

Datum:

12 Apr 1955 Jahr
Jetzt
~ 70 years ago

Abbildungen:

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