John Snow created this map to show the spread of cholera cases around the Broad Street water pump in London in 1854. Snow's investigations during this outbreak are regarded as groundbreaking, and he is known as the father of epidemiology.
Source:
The Historical Medical Library of The College of Physicians of Philadelphia. Snow J. On the Mode of Communication of Cholera, 2nd ed. London: Churchill, 1855.
Creator:
The Historical Medical Library of The College of Physicians of Philadelphia
