Background: Blinatumomab induces a high proportion of complete molecular responses in relapsed or refractory B-cell acute lymphoblastic leukemia (ALL) and ALL with persistent or recurrent measurable residual disease (MRD) after initial therapy. However, responses are generally short if they are not followed by allogeneic stem cell transplantation (HSCT). We infer that blinatumomab needs to be incorporated sequentially into the early phase of treatment to enhance rates of MRD negativity, lower the need of HSCT and improve survival.