Which of the following is the desired physiologic reaction that occurs after the administration of a vaccine that contains live, attenuated viruses?

Question

Quizplus · Accepted Answer

The desired physiologic reaction after the administration of a vaccine that contains live, attenuated viruses is that the immune system will create specific antibodies to the viruses in the vaccine. This is because the viruses in the vaccine have been weakened (attenuated), but still contain enough of their original viral components to stimulate an immune response. The immune system will recognize these components as foreign and produce antibodies that are specifically targeted to neutralize and eliminate the virus. This creates immunity against future infections, without causing the actual disease. Option A is incorrect because the antibodies in the vaccine do not multiply in the body, but rather, the immune system produces its own new antibodies in response to the vaccine. Option C is incorrect because antigens are foreign substances that stimulate an immune response, whereas the viruses in the vaccine are not antigens but rather are recognized as foreign by the immune system. Option D is incorrect because live, attenuated viruses in a vaccine do not act as antigens or stimulate a nonspecific immune response, but rather, they stimulate a specific immune response against the viruses in the vaccine.

Which of the Following Is the Desired Physiologic Reaction That