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1 ene 1955 año - Polio Vaccine

Descripción:

Jonas Salk discovers the polio vaccine. Polio was a disease that killed, and permanently crippled people (often in childhood) around the world. Salk's discovery helped save countless lives and prevented huge amounts of suffering.

Añadido al timeline:

8 feb 2023
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fecha:

1 ene 1955 año
Ahora mismo
~ 70 years ago

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