One kind of vaccine consists of
A) T cells.
B) B cells.
C) a harmless variant strain of a disease-causing microbe.
D) antibiotics.

Question

Quizplus · Accepted Answer

A vaccine is typically made from a weakened or dead strain of a disease-causing microbe, to activate the immune system without causing disease. This helps the body create memory T and B cells that recognize and fight the microbe in case of future exposure, without causing the actual disease. Antibiotics are not a type of vaccine, and T and B cells are part of the immune system and are activated by vaccines, but are not vaccines themselves.

One Kind of Vaccine Consists of