Epidemics of polio and measles used to be common in the United States. Now they are rare. What is the best explanation for this?
(Group of answer choices)
A. water monitoring and treatment
B. widespread vaccination
C. insecticides that kill transmitting pests
D. careful use of antibiotics
Answers: 3
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Epidemics of polio and measles used to be common in the United States. Now they are rare. What is th...
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