The dynamics of CD7⁺ T cells, NK cells, and CD7CAR gene copy numbers in each patient. (Left y-axis) The percentages of CD7⁺ T cells and NK cells as determined by FCM. (Right y-axis) CD7CAR gene copy number by qPCR. CD7⁺ T and NK cells were eliminated by NS7CAR T cells. An adequate recovery was observed among normal CD7⁺ T and NK cells after allo-HSCT. The 4 patients (Pt.05, Pt.07, Pt.11, and Pt.15) missed the time window for blood check within the 1 week after transplant to observe the decline in T and NK cells.