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18 oct. 1826 - Semmelweis chlorine hand washing 1847

Description:

Based on spread of childbed fever

Ajouté au bande de temps:

B HLTH 224

ByJohnny
14 déc. 2018
1
0
522

Date:

18 oct. 1826
Maintenaint
~ Il y a 199 ans
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