Denis-Claude Roy, MD, FRCPC, from the University of Montreal, Montreal, Canada, speaks about potential methods to minimize the occurance of graft-versus-host disease (GvHD) using anti-leukemia and anti-viral T-cell immunotherapy of photodepleted allogeneic T-cells. This interview took place at the European Society for Blood and Marrow Transplantation (EBMT) 2019 Annual Meeting, held in Frankfurt, Germany.