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3 mar 1955 ano - Polio Vaccine Developed

Descrição:

Dr. Jonas Salk developed an inactivated polio vaccine (IPV) and it became available in the United States. The United States was subsequently declared polio-free in 1979.

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Public Health Timeline

ByMackenzie Collins
16 jan 2019
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0
562

Data:

3 mar 1955 ano
Agora
~ 70 years ago

Imagens:

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