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Subsets of CD4+ and CD8+ T cells. Identified by, naïve (TN)-CD4+/CD8+CD45RA+CCR7+, central memory (TCM)-CD4+/CD8+CD45RA-CCR7+, effector memory (TEM)-CD4+/CD8+CD45RA-CCR7-, CD45RA+ effector memory (TEMRA) or terminally differentiated effector memory-CD4+/CD8+CD45RA+CCR7-.
