Dr. Yannis K. Valtis is a leukemia specialist and cellular therapist at Memorial Sloan Kettering Cancer Center, where he focuses on treating adults with leukemia and other blood cancers. His expertise includes the use of cellular therapies, such as CAR T-cell therapy, to improve outcomes while reducing chemotherapy side effects. Dr. Valtis is also active in clinical research, working to develop and refine new treatment options for patients.