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.

Dr John Snow, a physician and specialist in ... a water pump as a cause of disease and death. In 1854, during the third cholera outbreak in London, Snow set out to prove his theory that unclean ...

Plan Showing the Ascertained Deaths from Cholera in Part of the Parishes of St. James, Westminster and St. Anne, Soho, during the summer and autumn of 1854.; The plan is from a report on the cholera ...

It was made in 1854 by a London physician named John Snow. He suspected that the cholera outbreak in London’s Soho neighborhood, which killed 616 people, was spread through water, not air. At that ...