Which statement about vaccines is true?
A)Most bacterial vaccines contain attenuated organisms.
B)Most viral vaccines are made by using dead organisms.
C)Vaccines require booster injections to maintain lifelong protection.
D)Vaccines provide effective protection for all people against viruses, bacteria, and fungal infections.

Question

Quizplus · Accepted Answer

In general, vaccine-induced protection does not persist as long as infection-induced immunity, thus booster injections may be necessary to maintain protection throughout life.

Which Statement About Vaccines Is True