Recipients of G-PB grafts from unrelated donors have faster T-cell reconstitution than recipients of BM grafts. Mean numbers of immune cells in the blood are shown with the 25th and 75th percentiles at the upper and lower limits of the “box” and 95% confidence intervals (“whiskers”) at 1, 3, 6, 12, and 24 months posttransplant for recipients of BM (blue) or G-PB (red) grafts for total T cells (A), CD4⁺ T cells (B), CD8⁺ T cells (C), CD4⁺ Tregs (D), γδ T cells (E), B cells (F), cDCs (G), pDCs (H), CD56⁺ CD16⁺ NK cells (I), and CD56⁺ CD16⁻ NK cells (J). ***P < .001, **P < .01.