John Snow is often called the founder of epidemiology, the study of health in populations. He is best known for his work on tracking the spread of cholera during an epidemic in London in 1854.

In 1848, there was a second outbreak of cholera in London. Dr John Snow, a physician and specialist in medical hygiene, doubted that bad air caused the disease. Dr Snow carried out his own ...

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In 1854, cholera struck again. In London, Dr John Snow studied the spread of cholera in the Broad Street area. He noticed that the victims had all drunk water from the pump in the street.

Part of our Best Pubs in London microsite ... first to find evidence that cholera spreads through tainted water. John Snow started mapping incidences of the disease in Soho, and noticed clusters ...