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16h 24min, jan 1, 1721 y - Concepto de variolación que consiste en la inoculación con pus de una víctima infectada con viruela de la vaca.
Added to timeline:
evidencia 3
By
Samantha Rodriguez
15 Nov 2017
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372
Date:
16h 24min, jan 1, 1721 y
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~ 305 years ago
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