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theory that cholera is communicated by means of a contaminated water-supply
'''John Snow''' is considered the father of modern [[epidemiology]].
'''John Snow''' is considered the father of modern [[epidemiology]].
He contributed "the theory that [[cholera]] is communicated by means of a contaminated water-supply."<ref> [http://www.ph.ucla.edu/epi/snow/snowbio.html Biography of John Snow]</ref>
==References==
<references />
==Links==
==Links==