Safety and Efficacy of CD19 CAR-T/CAR-NK Cells

One to two days after completion of eluvial chemotherapy, CAR-T/CAR-NK cells were transfused in subjects assessed by the investigators as eligible for infusion. The CAR-T/CAR-NK dose is calculated according to the patient's body weight, and the total number of cells transfused is about 1-2x106 /kg. Single intravenous infusion