CD19 and acute lymphoblastic leukemia: In total, 15 of the responders (25%) received additional ALL-targeted therapies post infusion: eight (13%) underwent HSCT (two due to early loss of B-cell aplasia [BCA], two due to MRD in the bone marrow, and four for unknown reasons), seven (12%) received new cancer therapies other than HSCT during morphological remission [four humanised CD19 CAR-T, one ponatinib, one vincristine and blinatumomab, and one anti-thymocyte globulin (ATG)].