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AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
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18 out 1826 ano - Semmelweis chlorine hand washing 1847

Descrição:

Based on spread of childbed fever

Adicionado na linha do tempo:

B HLTH 224

ByJohnny
14 dez 2018
1
0
522

Data:

18 out 1826 ano
Agora
~ 199 years ago
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