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1854 Broad Street cholera outbreak


PredictionX: John Snow and the Cholera Epidemic of 1854 | HarvardX on edX | Course Video


1854 Broad Street cholera outbreak


1854 Broad Street Cholera Outbreak


The Cholera Epidemic


1854 Broad Street cholera outbreak in London

The Broad Street cholera outbreak was a severe outbreak of cholera that occurred in 1854 near Broad Street in the Soho district of the City of Westminster, London, England, and occurred during the 1846–1860 cholera pandemic happening worldwide. This outbreak, which killed 616 people, is best known for the physician John Snow's study of its causes and his hypothesis that germ-contaminated water was the source of cholera, rather than particles in the air. This discovery came to influence public health and the construction of improved sanitation facilities beginning in the mid-19th century. Later, the term "focus of infection" started to be used to describe sites, such as the Broad Street pump, in which conditions are good for transmission of an infection. Snow's endeavor to find the cause of the transmission of cholera caused him to unknowingly create a double-blind experiment.
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    • Background 

    • Competing theories of cholera 

    • Investigation by John Snow 

    • Broad Street outbreak 

    • Snow's post-outbreak evaluation 

    • Involvement of Henry Whitehead 

    • Dr Edwin Lankester's evaluation