Question

What was the explanation for the lack of cholera cases in the brewery near Broad Street during John Snow’s investigation? Why did he remove the pump handle?

Answer 1

-> John Snow's theory :- He is a british physician and considered as the father of modern epidemiology. He discovered the spreading of cholera is through contaminated water In london, cholera became epidemic and snow suspected that spreading occur due to contaminated water. He suspected that the water from pump Broad street is the source of cholera spreading. He reviewed death records and suspected this so he showed his findings to the heads of community and the pump handle is removed. Thus deaths due to cholera decreased because of removal of pump handle. Thus during snow's investigation cholera is decreased in the brewery near Broad street: