In this episode of Vox Almanac, Vox’s Phil Edwards explores Dr. John Snow’s map of the Broad Street Pump, which changed epidemiology forever.
In 1854, news spread about a mysterious new cholera outbreak in London. At the time, doctors and scientists largely believed the disease traveled in a “miasma” — a floating cloud of sickness. Dr. John Snow suspected bad water might actually be the agent of transmission — and he wanted to prove it in time to stop the outbreak.
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