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2 mar 1955 año - Jonas Salk

Descripción:

Created the IPV for polio - it's an inactive vaccine that isn't alive and doesn't have to be refrigerated. He created the first successful vaccine.

Añadido al timeline:

Tis but a scratch: Disease Timeline

13 dic 2018

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495

fecha:

2 mar 1955 año

Ahora mismo

~ 70 years ago

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