It all starts with a pump.
It all starts with a pump.
In this episode of Vox Almanac, Vox’s Phil Edwards explores the story behind Dr. John Snow’s famous map of the Broad Street pump.
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.
Through a mix of personal interviews, clever detective work, and data analysis that included tables and a famous map, Snow managed to stop the outbreak and convince local public health officials, eventually, that cholera could be transmitted through water, not a miasma. Since his breakthrough study, the map has become an iconic piece of epidemiological history — an illustration of keen detective work, analysis, and visual representation that, even today, tells a story.
Watch the above video to learn more. You can find this video and all of Vox’s Almanac series on YouTube.
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Author: Phil Edwards
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