jan 2, 1863 - Yersinia Pestis is Pinned as Black Death Cause By Alexander Yersin
Description:
After noting that there were a lot of rats in China during the plague outbreak in the 1860's, Yersin not only made a connection between rats and plague but then used what would later be known as Koch's Postulates to discover the bacteria that causes the plague.
Added to timeline:
Disease Through History: Important Points in Human Civilization As Told Through Illness
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