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AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
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28 oct 1964 año - First vaccine developed for measles.
Descripción:
John Enders transformed their virus into a vaccine.
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By
Jonathan Rawlings
6 nov 2018
0
0
187
fecha:
28 oct 1964 año
Ahora mismo
~ 61 years ago
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