Which of the following helped to prevent cholera epidemics in the large industrialized cities? A. the availability of vaccinations B. an increase in the number of medical clinics C. the construction of

Which of the following helped to prevent cholera epidemics in the large industrialized cities?

A. the availability of vaccinations
B. an increase in the number of medical clinics
C. the construction of tenement housing
D. the chlorination of drinking water

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Which of the following helped to prevent cholera epidemics in the large industrialized cities? A. the availability of vaccinations B. an increase in the number of medical clinic…

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