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The Ghost Map By Steven Johnson

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The Ghost Map by Steven Johnson is a very detailed account of Dr. John Snow’s remarkable discovery of how Cholera was spread in the 19th century. Johnson chronicles the everyday life of the average english man and woman, and in doing so, reveals the intricacies of changing the way a society thinks and responds to change. The Ghost Map reflects the correlation of the spread of Cholera and social status in 19th century England. It also shows prevailing scientific beliefs at the time and their effect on medicine, accounts Dr. John Snow’s early involvement in Epidemiology and finally, it proves that the perception of diseases were forever changed, due to the work of John Snow and Reverend Henry Whitehead. In the very first chapter, Steven Johnson begins to set the scene of how the overpopulation of London coupled with extreme levels of poverty created the perfect opportunity for Cholera to spread in the rapid manner that it did. On page one it states; “These were the London underclasses, at least a hundred thousand strong. So immense were their numbers that had the scavengers broken off and formed their own city, it would have been the fifth-largest in all of England.” Johnson mentions that the city of London had become a city of Scavengers, consisting of; bone-pickers, pure-finders, dredgermen, sewer-hunters and night-soil men. However, the harshest reflection of the Cholera epidemic of 1854 is conveyed by John Snow himself. On page 59 it states; “The young Snow observed

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