One reason given for the low rates of infection of cholera in developed countries is

Question

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Developed countries have implemented health policies designed to regulate clean water, which prevents the spread of cholera. Cholera is transmitted through the consumption of contaminated water, and clean water regulations decrease the likelihood of exposure to contaminated water. Immunizations are not effective against cholera, and mosquito control is not relevant to the transmission of cholera.

One Reason Given for the Low Rates of Infection of Cholera