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28 feb 1237 año - Vaccine

Descripción:

John Enders and his colleagues transform a strain of Measles virus into a vaccine and license it in the United States.
(from https://www.cdc.gov)

Añadido al timeline:

A Timeline Of Mankind's Worst Enemy

ByAron Kifle
14 dic 2018

fecha:

28 feb 1237 año
Ahora mismo
~ 787 years ago

Fotos:

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