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<p>and physician, was able to determine the source of a <a href="page.php?w=1854_Broad_Street_cholera_outbreak">cholera outbreak in London</a> through the use of spatial analysis. Snow achieved this through plotting the residence of each casualty on a map of the area, as well as the nearby water sources. Once these points were marked, he was able to identify the water source within the cluster that was responsible for the outbreak. This was one of the earliest successful uses of a geographic methodology in pinpointing the source of an outbreak in</p><p>
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