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jul 31, 1873 - Hansens disease germ first discovered

Description:

Dr. Gerhard Henrik Armauer Hansen of Norway was the first person to identify the germ that causes leprosy under a microscope. Hansen's discovery of Mycobacterium leprae proved that leprosy was caused by a germ, and was thus not hereditary, from a curse, or from a sin.

Added to timeline:

14 Dec 2018
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Date:

jul 31, 1873
Now
~ 152 years ago

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