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The Ghost Map: Hard Lessons in Epidemiology from Victorian London

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John Snow's data journalism: the cholera map that changed the world

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John Snow’s cholera map helped to show that contaminated wells were at the center of outbreaks. His research helped save countless lives and set the foundation for the field of epidemiology

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John Snow was one of the first epidemiologists in the 1800s. He mapped out the cases of the cholera outbreak in London to find the cause and recurrence by investigating the people infected.

John Snow's Cholera Map | Framed Print

Original map by father of epidemiology John Snow showing the clusters of cholera cases in the London epidemic of 1854, drawn and lithographed by Charles Cheffins. / It is in the public domain. • Also buy this artwork on wall prints, apparel, phone cases, and more.

The 200th anniversary of John Snow’s birth on 15th March 2013 provides an occasion to celebrate Snow’s achievements - best known for his work on cholera, for a famous map, and for organizing the removal of a pump handle on Broad Street on 8th September 1854.

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John Snow's data journalism: the cholera map that changed the world

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