Kaplan Nursing Practice Questions - Kaplan Nursing School Admissions Test Exam

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Read the passage and answer the question. Vaccines work by introducing a weakened or inactive form of a pathogen into the body. The immune system recognizes the foreign substance and produces antibodies in response. If the person later encounters the actual disease-causing organism, their immune system can mount a rapid defense. This process, called immunization, has prevented millions of deaths worldwide from diseases such as smallpox, polio, and measles. Which statement best expresses the main idea of the passage?

Smallpox, polio, and measles have been eliminated through vaccination. Vaccines train the immune system to recognize and fight specific pathogens. Antibodies are the body's main defense against viral infections. Inactive pathogens are safer than weakened pathogens for use in vaccines.

Correct Answer:

Vaccines train the immune system to recognize and fight specific pathogens.

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