The biggest killers of humans in history are the smallest organisms on the planet. From the Bubonic Plague to Smallpox, Influenza, and AIDS, today we look at the 5 worst plagues in human history.

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LINKS LINKS LINKS:

CGP Grey’s Americapox video:
   • Americapox: The Missing Plague  

Matthew Santoro:
   • 10 Most DEVASTATING PLAGUES in History!  

https://www.rwjf.org/en/blog/2013/12/...

http://listverse.com/2009/01/18/top-1...

https://www.oddee.com/item_90608.aspx