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28 Feb 1237 Jahr - Vaccine

Beschreibung:

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)

Zugefügt zum Band der Zeit:

A Timeline Of Mankind's Worst Enemy

14 Dez 2018

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28 Feb 1237 Jahr

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~ 789 years ago

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