(Science: immunology) cells of the immune system that do not respond immediately when it first encounters an antigen but facilitates the more rapid secondary response when the antigen is encountered on a subsequent occasion.
The long lasting immune memory is humoral and resides in b-cells, although it appears that persistence of the antigen may be essential. T-cell memory is shorter. A type of [[lymphocyte that is released as a [[specific immune response that is stored in case the specific [[ antigen attacks once again. Live vaccinations are used to initiate the production of [[memory cells.