Association of CMV reactivation with T- and NK-cell reconstitution at 100 days in unrelated donor allografts using BM vs PB as a graft source. The frequency of CD4⁺ T cells (A), CD8⁺ T cells (B), and total NK cells (C) were determined based on a lymphocyte gate determined by forward and side scatter. The NK cells (CD56⁺/CD56⁻ gate) were subsetted into CD56^bright (D), CD56^dim (E), and KIR⁺NKG2A⁻ (F) NK cells in 3 groups based on CMV reactivation status and in BM vs PB groups separately. Blue numbers on the x-axis show medians. CMVr, patients who reactivated CMV by day 100; CMV+, CMV-seropositive patients who did not reactivate CMV by day 100; and CMV−, CMV-seronegative patients who did not reactivate CMV by day 100. *P < .05; **P < .01; ***P < .001.