This comprehensive set is crucial to the basic understanding of the immune system and is an essential component of the design and implementation of improved immunization strategies. Contains au-thoritative reviews of cell migration research and addresses the is-sues of lymphocyte recirculation leading to inductive interactions, and the subsequent migration and homing of effector cells gener-ated from these responses. Systemic migration of cells from the central and peripheral lymphoid organs, the dichotomy of behavior between systemic and mucosal lymphoid cell pools, and explana-tions sought for mechanisms mediating selectivity of migration and homing are covered. This set is of interest to problem oriented sci-entists.