In recent years, the incidence of polio, measles, and diphtheria in the United States have declined dramatically as the result of

Question

Quizplus · Accepted Answer

The administration of vaccinations has been shown to be effective in reducing the incidence of polio, measles, and diphtheria in the United States. Vaccinations work by stimulating the body's immune system to produce a specific response against a particular disease-causing agent, providing immunity against future infections. This has been a key factor in reducing the incidence of these diseases in recent years. The other options (reduction in chemical teratogens, better maternal prenatal nutrition, and genetic engineering) have not been significant factors in reducing the incidence of these diseases.

In Recent Years, the Incidence of Polio, Measles, and Diphtheria