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9 ene 1954 año - Polio Vaccine

Descripción:

The first vaccination of children against polio begins in Pittsburgh, Pennsylvania. People marveled at the high-success rate of the new vaccine. Cases of Polio dropped from around 15,000 cases to about 5,000 cases.

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The Good ol' Days 2018

ByKen Burrow
16 dic 2018
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fecha:

9 ene 1954 año
Ahora mismo
~ 71 years ago
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