Blood and bone marrow transplantation is the transplantation or infusion of blood stem cells either collected from the blood or bone marrow. Johns Hopkins offers both autologous bone marrow transplants—the patient receiving the transplant is also the donor—and transplants from a suitably matched donor. Director of the Pediatric Blood and Marrow Transplantation Program Kenneth Cooke discusses the transplantation process as well as research and innovations Johns Hopkins is using to optimize result