sentence: Memory cells live a long time in the body, and are how vaccinations work.
sentences_before: Once they are made active, B cells and T cells produce 'memory cells'. Throughout the lifetime of an animal, these cells will 'remember' each specific pathogen encountered, and are able to make a strong response if the pathogen is detected again.
concept_name: memory cell
headings: Lymphocyte Types T and B cells
categories: Cell biology Immunology Blood cells