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26 mar 1953 año - Polio

Descripción:

Dr. Jonas Salk tells the public that he's come up with a vaccination for Polio. In April of 1955 it was said that his vaccination for it was effective and safe.

Añadido al timeline:

Historical events

ByHailey Wessel
14 dic 2017
0
0
450

fecha:

26 mar 1953 año
Ahora mismo
~ 72 years ago

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