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Scholar:
Date:
Monday, July 15, 2019
Retweets:
107 retweets
(Twitter) Likes:
217 likes
Body:
Before it was eradicated in 1979, smallpox was one of humanity's oldest diseases. The virus can be traced back to pharaonic Egypt, is thought to have killed between 300-500 million people as late as the 20th century. Enter, Edward Jenner. #HeroesOfProgress