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William Farr gathered evidence linking death rates with unsanitary living conditions. This forced the local and national government to make a change.

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Cholera spread across Europe. After noticing this, the Public Health Act allowed Chadwick's proposal, hoping it would lower Cholera cases.

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John Snow (a fully-qualified doctor) recommended his idea of Cholera being spread through polluted water. This suggestion was highly mocked by countless doctors, that supported the air theory.

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National Board of Health was abolished just after six years.

Not only this, but at this time another Cholera outbreak took place. This allowed John Snow to gather hard evidence that Cholera was spread through water. The evidence that he assembled was remarkable, removing the Broad Street water pump. As a result of this, the deaths originating from Cholera ceased.

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The rain levels dropped drastically, leading to lower water levels in the sea. As a result of this, the ratio of water to sewage in the river became more in the sewage's favor, making the town smell terrible. This was called "The Great Stink".

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Louis Pasteur established his germ theory on the rapid spread of Cholera.

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Pasteur held an array of experiments shown to the public that convinced many of them, along with scientists, that Cholera was spread through unsanitary water. Due to this, and abundant amount of people were willing to pay their own money for cleaner toilets, good sewers and fresh water supplies imported from other countries/cities. Many local towns began to act on this. However, at this point, this was not required.

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Men in working class were granted the ability to vote for political debates. As a result of this, an overwhelming amount of people vote to make the sanitary actions compulsory in every town.

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As a result of this event, the Great Clean-up happened.