A.A.A., S.M., and K.M.E. elderly persons, CMV-specific T cells can comprise up to 40% of CD8+ T cells,5,6 have shortened telomeres, have little to no proliferative capacity to new antigens, and are resistant to apoptosis.7 CMV seropositivity and high proportions of terminally differentiated CMV-specific T cells characterize an immune risk Continue Reading