Dot Distribution Maps use dots to show presence and frequency of a specific characteristic. In my Medicine and Society class, we learned about the Cholera Epidemic and how, at first, professionals were unsure of how the the sickness was spreading until one doctor, John Snow, created a dot distribution map showing the evident cases of Cholera. This map shows that the disease was concentrated on Broad Street and he was able to infer that the disease was being spread through the water pump on Broad St after shutting down the pump. Unfortunately, despite his methods, his theory was widely regarded as ludicrous.
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