“We are excited about the treatment outcomes as this patient had a relapsed B-cell ALL after prior treatment with chemotherapy and blinatumomab. His relapsed disease was both CD19- and CD22-negative, implying very limited available therapeutic options for him,” said Ibrahim T. Aldoss, M.D., City of Hope associate professor, Department of Hematology & Hematopoietic Cell Transplantation and the principal investigator of this single-center, dose escalation with expansion trial (NCT04690595).