Sung-Yun Pai MD is a physician-scientist trained in pediatric hematology, oncology, and stem cell transplantation, was faculty at Boston Children’s Hospital and Dana-Farber Cancer Institute from 2001-2020, and now is a tenured Senior Investigator and Chief of the Immune Deficiency Cellular Therapy Program, Center for Cancer Research, National Cancer Institute, National Institutes of Health. Her research focuses on inborn errors of immunity (IEI) and its treatment with allogeneic hematopoietic stem cell transplantation and autologous gene therapy using viral vectors. She has published widely in the field of allogeneic transplantation for IEI, including SCID, Wiskott-Aldrich syndrome, DOCK8 deficiency, and others.