On June 30, 2026, the Food and Drug Administration approved allogeneic regulatory T cell-based immunotherapy with hematopoietic stem and progenitor cell (HSPC) and T cells-vldq (Tregzi, Orca Bio) for use in matched donor hematopoietic stem cell transplantation (HSCT) with a myeloablative preparative regimen, for hematopoietic and immunologic reconstitution and to improve chronic graft-versus-host disease (cGHVD)-free survival, in the treatment of adults with hematological malignancies.