John Snow Cholera Map

John snow’s well known cholera map is often cited as one of the earliest known examples of using geographic inquiry to understand a health epidemic although his famous dot map was actually created after the cholera epidemic to show disease clusters. John snow made a map. Cholera struck again, leaving nearly 2,000 dead in seven days.

Harness the power of maps to tell stories that matter. His cholera map helped make john snow the father of modern epidemiology. By seeing, visually, where the cholera deaths were clustered, snow showed that the water from a pump on broad street was to blame.

In the world of the 1850s, cholera was believed to be spread by miasma in the air, germs were.

To replicate and understand some of the insights snow gained during and after the epidemic, we prepared For the 1854 cholera outbreak in london's broad street region, he presented two maps. John snow's map 1 (1854) source: Snow's map of the cholera outbreak of 1854, and the reports that it accompanied, eventually won over the medical community of the day, as well as the burgeoning public health system in london, and by the time london saw another outbreak of cholera, most had been convinced.