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18 Okt 1826 Jahr - Semmelweis chlorine hand washing 1847

Beschreibung:

Based on spread of childbed fever

Zugefügt zum Band der Zeit:

B HLTH 224

14 Dez 2018

1

0

519

Datum:

18 Okt 1826 Jahr

Jetzt

~ 199 years ago

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