Question

B cells and T cells that do not immediately attack pathogens, but that instead remain inactive until a future encounter with the pathogen, are called
(A) Residual lymphocytes
(B) Stem B and T cells
(C) Leukocyte reservoir cells
(D) Memory B and T cells

Answer 1

try eliminating the options. There are three options in the given choices which you generally do not come across in immunology or one choice which you very frequently come across in immunolgy. This option is the basis for designing vaccines .