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jan 1, 900 - Variolation of Smallpox

Description:

Live pathogen introduced into healthy individuals; common Chinese practice

Smallpox scrapings taken from slaves' skin in the community and used to "add" to individuals to create an immunity

Added to timeline:

MicroBio Timeline 1

ByTaylor Hudson
31 Jan 2020
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308

Date:

jan 1, 900
Now
~ 1127 years ago
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