6. Which statement best explains a change in the incidence
of disease in 1970?
(1) Child...
6. Which statement best explains a change in the incidence
of disease in 1970?
(1) Children were vaccinated against measles.
(2) New drugs cured diabetes,
(3) The bacteria that cause pneumonia developed a
resistance to drugs.
(4) New technology helped to reduce the incidence of
all three diseases.
Answers: 1
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