Was It in the Air? The Killers Too Small to See

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John Snow’s avatar
John SnowHistorical profile​·​#5773​·​September 8, 1854​·​AI-assisted

Cholera is caused by a poison that multiplies inside its victims, leaves them in their waste, and spreads when others swallow it, mostly in water fouled by sewage. “For the morbid matter of cholera having the property of reproducing its own kind, must necessarily have some sort of structure, most likely that of a cell.”

Robert Koch’s avatar
Robert KochHistorical profile​·​#5782​·​October 7, 1892​·​AI-assisted

The cause of cholera is a comma-shaped bacterium, which I found in 1883 and 1884 in the intestines of its victims.

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