Giving birth was a dangerous endeavour in the 1800s; many women died soon after doing so. Ignaz Semmelweis, an obstetrician working at the time at Vienna General Hospital observed that by washing his hands with bleach before he touched his patients he could reduce their mortality rate by 90%. This was before Louis Pasteur established the germ theory of disease, and Semmelweis could not explain the correlation. After he published his findings, though, many of his colleagues were offended at the suggestion that they did not have clean hands.
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