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AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
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9 ene 1952 año - Polio

Descripción:

Jonas Salk develops first Polio Vaccine which is an inactive version of Polio and is administered via injection by trained health professionals, but is expensive.

Añadido al timeline:

Diseases and Discoveries Related That Have Impacted Recorded Human History

ByTommy Chhoeum
14 dic 2018
1
0
926

fecha:

9 ene 1952 año
Ahora mismo
~ 73 years ago
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