Phase 2 Study to Assess the Safety and Efficacy of Subcutaneous Blinatumomab in Patients With Measurable Residual Disease Positive B-cell Acute Lymphoblastic Leukemia

Inclusion Criteria * Participants of age ≥18 years with documented B-cell ALL with recurrent or persistent MRD (at a sensitivity of 10-6) while in morphological remission (Includes Ph-, Ph+ and Ph-like). * ECOG Performance status of 0, 1, or 2. * Adequate organ function with creatinine less than or equal to 1.6 mg/dl, bilirubin less than or equal to 3.5 mg/dl and ALT and/or AST less than or equal to 5 times institutional upper limit of normal. * The effects of blinatumomab on the developing human fetus are unknown. For this reason and because bispecific T-cell engager agents as well as other therapeutic agents used in this trial are known to be teratogenic, women of child-bearing potential and men must agree to use adequate contraception (hormonal or barrier method of birth control; abstinence) prior to study entry and for the duration of study participation. (Refer to Pregnancy Assessment Policy MD Anderson Institutional Policy # CLN1114). This includes all female Participants, between the onset of menses (as early as 8 years of age) and 55 years unless the Participant presents with an applicable exclusionary factor which may be one of the following: * Postmenopausal (no menses in greater than or equal to 12 consecutive months). * History of hysterectomy or bilateral salpingo-oophorectomy. * Ovarian failure (Follicle Stimulating Hormone and Estradiol in menopausal range, who have received Whole Pelvic Radiation Therapy). * History of bilateral tubal ligation or ano…