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AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
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19 mayo 1718 año - Mary Wortley Montagu introduced variolation
Descripción:
this was the first step to inventing vaccines
Añadido al timeline:
Alex malone disease history timeline
By
Alexander Malone
14 nov 2018
0
0
426
fecha:
19 mayo 1718 año
Ahora mismo
~ 307 years ago
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