John Snow 1) __________ born in 1813 in York, England and was the eldest of nine children. When he 2) __________ fourteen, he started working for a surgeon and went on to study medicine.
In 1855, a lot of people started dying in an area of London of the illness cholera and John Snow went there to study what was 3) __________. He discovered that the people who had died were drinking 4) __________ same water.
Before this study, no one 5) __________ how people got the illness. The results of his study 6) __________ important because they 7) __________ how the illness spread and also 8) __________ to start the science of public health.