RecruitingPhase 2Drug trialStudy of KTE-X19 in Minimal Residual Disease (MRD) Positive B-Cell Acute Lymphoblastic Leukemia (B-ALL)This is a Phase 2 Study is to determine the efficacy and safety rate of B-Cell Acute Lymphoblastic Leukemia (B-ALL) participants in remission with minimal residual disease (MRD) after KTE-X19 CAR T-cell therapy