Question

what happens to most cytotoxic and helper t cells after an infection is cleared?
a the activated t cells die off except for memory cells.
b the activated cells continue to make armies of t cells.
c the army of activated cells turn into an army of memory cells.

Explanation:

After an infection is cleared, the immune - system downregulates its response. Most activated cytotoxic and helper T cells undergo apoptosis (programmed cell death), while a subset differentiate into long - lived memory T cells that can quickly respond to future infections by the same pathogen.

Answer:

A. The activated T cells die off except for memory cells.