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Between 1800 to 1955 which sanitation practices began to be applied and at what time? (During the tuberculosis era). When did hand washing become widely recommended and how did we discover the importance of it in helping to prevent the spread of infections?

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Please support with an article from a reputable site : Between 1800 to 1955 which sanitation practices began to be applied and at what time? (During the tuberculosis era).
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