immunological memory

• • It is a more rapid response because of the presence of B and T memory cells from the primary response.
• • When the adaptive immune system is exposed to the same pathogen again this initiates a secondary immune response. 
• • Antibody-producing plasma cells and cytotoxic T cells are produced, and they work to clear the infection. The body stores memory B and T cells for the next time it encounters the pathogen.
• • When the adaptive immune system is first exposed to a pathogen, the response of B and T cells is called the primary immune response.