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1 mar 1000 año - 1,000 AD China

Descripción:

Blew dried small pox scab powder of a weaker case up nose. Observed that if the person the scab came from survived the chance of the person they were giving the scab to was higher.

Añadido al timeline:

Vaccine

ByJailyn Moody
24 ene 2018

fecha:

1 mar 1000 año
Ahora mismo
~ 1024 years ago

Fotos:

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