PATHOLOGY

Detailed explanation-1: -If the body is exposed to the same pathogen more than once, the antibody response is much faster and more effective than the first time around because the memory cells are at the ready to pump out antibodies against that antigen.

Detailed explanation-2: -As part of the adaptive immune response, some T and B cells change into memory cells. Memory cells mostly stay in the lymph nodes and the spleen and “remember” particular antigens. If a person becomes infected with the same pathogen again, these cells are able to quickly and vigorously begin fighting the infection.

Detailed explanation-3: -The first time we encounter a pathogen, our bodies generate a primary immune response. Subsequent exposures, on the other hand, benefit from secondary (or memory) immune responses.