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 life-long protection.
D) Vaccines provide effective protection against most 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.The other options are not true of vaccines.

Which Statement About Vaccines Is True