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jan 4, 1859 - Paul-louis Simond 1858-1947 (plague)

Description:

Simond was a French army physician who
discovered that rats who did not get fleas did not get sick.
He discovered that the fleas were attached to the rats who acted as as vehicles for the fleas to infect others.

Added to timeline:

Disease Timeline

ByJonnyP
14 Dec 2018
1
0
523

Date:

jan 4, 1859
Now
~ 167 years ago

Images:

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