 Pre-1 Writing Sample 5 (No.2038 への返信) - Takeshi  |
( 5 ) Cholera in Britain
Although the water-borne disease cholera is now rare in developed countries, it killed many people before the 1900s. In Britain, for example, there were three major cholera outbreaks between 1830 and 1860, each causing over 20,000 deaths. Cholera was widely believed to be caused by “miasma,” or bad air.
During the 1854 cholera outbreak in London, British doctor John Snow studied the pattern of deaths in the city. He noticed that many households in one street became ill while those in the next street were unaffected. At that time, most Londoners got their water from public wells, and people on different streets often used different wells.
Snow concluded that the common factor in the deaths was in fact dirty water. After Snow convinced city authorities
that his theory was correct, a water and sewage system was created that improved hygiene and eventually resulted in the disappearance of cholera in Britain.
[No.2039] 2024/05/20(Mon) 15:20:26 |
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