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jan 1, 1890 - Koch discovers tuberculin

Description:

not and effective treatment, but ended up being a good for diagnosis (pictured: tuberculin skin test still used today to determine if a person is exposed to TB)

Added to timeline:

From A to Zika: Diseases and Medical Advancements Through Time

ByClaire
14 Dec 2018
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Date:

jan 1, 1890
Now
~ 135 years ago

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