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How a map of dots found a cholera pump in 1854: John Snow and Broad Street
In late August 1854, cholera tore through a few streets of Soho, killing roughly 600 people in weeks. Almost everyone blamed foul air. John Snow suspected the…
How one doctor's map traced a cholera outbreak to a single pump
In 1854 most doctors blamed cholera on bad air. When it tore through Soho, killing hundreds in days, John Snow went door to door asking one question: where did…