Outcome after CD19.CAR-VST infusions without evidence of disease. Each panel represents a single patient. In all panels, black arrows denote the time of CD19.CAR-VST infusions, black circles indicate the detection of CD19.CAR-VSTs in the PB by Q-PCR, and red triangles represent the values of normal B-cell counts in the PB. (A-B) Data from patients 7 and 8 who received CD19.CAR-VSTs 8 months and 3 months after allogeneic HSCT, respectively.