1854 Broad Street cholera outbreak

The Broad Street cholera outbreak was a severe outbreak of cholera that occurred near Broad Street (now renamed Broadwick Street) in Soho district of London, England in 1854. This outbreak is best known for the physician John Snow's study of the outbreak and his discovery that cholera is spread by contaminated water. This discovery came to influence public health and the construction of improved sanitation facilities beginning in the 19th century.

• http://en.wikipedia.org/wiki/1854 Broad Street cholera outbreak
• Pages 227-228 - Johnson, Steven, 2006, The Ghost Map: The Story of London's Most Terrifying Epidemic – and How it Changed Science, Cities and the Modern World: Riverhead Books, New York, 299p.