Dr. Bruce Gellin, M.D. M.P.H., is President, Global Immunization at the Sabin Vaccine Institute. Dr. Gellin previously served as the Deputy Assistant Secretary for Health and Director of the National Vaccine Program Office at the U.S. Department of Health and Human Service (HHS), where he was the principal advisor to the Assistant Secretary for Health on vaccine and immunization programs and policies. Dr. Gellin also represented HHS as a technical and policy advisor to the World Health Organization with a focus on influenza and vaccine hesitancy and as a contributor to the Decade of Vaccines Collaboration and the Global Action Vaccine Action Plan (GVAP). Dr. Gellin earned an M.P.H. in epidemiology from the Columbia University Mailman School of Public Health, is a graduate of Weill Cornell Medical College, and was a Morehead Scholar at the University of North Carolina at Chapel Hill and previously worked at CDC and NIH. Dr. Gellin achieved board certification in internal medicine and infectious diseases and serves as a peer reviewer for over a dozen medical journals.