lymphocyte activation involved in immune response +
lymphocyte differentiation +
lymphocyte proliferation +
natural killer cell activation +
negative regulation of lymphocyte activation +
positive regulation of lymphocyte activation +
regulation of lymphocyte activation +
T cell activation +
The change in morphology and behavior of a mature or immature T cell resulting from exposure to a mitogen, cytokine, chemokine, cellular ligand, or an antigen for which it is specific.