Weird History
How the Real John Snow Stopped an Epidemic
2021 • E76 Jun 25, 2021 11m
Maps have the power to change minds, as the 1861 map that convinced Lincoln to end slavery proves. Maps also have the power to save lives. One such map, the John Snow map, single handedly ended a cholera outbreak and revolutionized epidemiology. Dr. John Snow’s cholera map of London charted deaths in the Soho neighborhood during the 1854 cholera outbreak.