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AIzaSyCYaC8UkdPkQKLFUmpasLV5eC3M802CrcA
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2

jan 9, 1908 - Charles Mantoux developed a skin test for tuberculosis.

Added to timeline:

2 Oct 2017
0
0
180
Engineering 2 9/29/17

Date:

jan 9, 1908
Now
~ 111 years ago
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