John Snow and the Pump Handle he dismantled.

(The London of John Snow displays the handle of Pump at Broad Street that he dismantled.) John Snow ( March 15 1813) is considered to be the father of modern epidemiology for the statistical mapping methods he initiated In the early Nineteenth century, physicians in Europe were convinced that cholera was caused by bad-smelling air.Continue reading “John Snow and the Pump Handle he dismantled.”