What is John Snow?
{{Infobox scientist |name = John Snow |image =John Snow.jpg |image_size =240px |caption = |birth_date =15 March 1813 |birth_place =[[York]], England |death_date =16 June 1858 (aged 45) |death_place =London, England |citizenship =United Kingdom |nationality =English |field =[[Epidemiology]] |alma_mater =University of London |known_for =[[Anaesthesia]]; finding source of a [[cholera]] outbreak, and the link between the infection and the water supply}} '''John Snow''' (15 March 1813 – 16 June 1858) was an [[English people|English]] [[physician]]. He used [[anaesthesia]] and medical [[hygiene]]. He is a founder of modern [[epidemiology]] because he traced the source of a [[cholera]] outbreak in [[Soho]], [[London]], in 1854.<ref>Snow, John 1855. ''On the mode of communication of cholera'', 2nd ed, much enlarged. London: Churchill. UCLA links: [http://www.ph.ucla.edu/epi/snow/snowbook.html] [http://www.ph.ucla.edu/epi/snow/snowbook2.html] [http://www.ph.ucla.edu/epi/snow/snowbook3.html] [http://www.ph.ucla.edu/epi/snow/snowbook4.html]</ref> His findings caused changes in the water and [[sewage]] systems of London. This led to similar changes in other cities, and a great improvement in general [[public health]] around the world. In 1837 Snow began working at the [[Westminster Hospital]]. Admitted as a member of the [[Royal College of Surgeons]] of England on 2 May 1838, he graduated from the [[University of London]] in December 1844 and was admitted to the [[Royal College of Physicians]] in 1850. == Anaesthesia == Snow was one of the first to study dosages for the use of [[Diethyl ether|ether]] and [[chloroform]] as surgical [[anesthesia|anaesthetics]]. This let patients to undergo surgery and [[obstetrics]] without distress and pain.<ref>[http://www.sciencemuseum.org.uk/broughttolife/people/johnsnow.aspx John Snow (1813–58)] {{Webarchive|url=https://web.archive.org/web/20160106163053/http://www.sciencemuseum.org.uk/broughttolife/people/johnsnow.aspx |date=2016-01-06 }}. sciencemuseum.or