David Thomas is a Professor of Medicine and Epidemiology at the Johns Hopkins Schools of Medicine and Bloomberg School of Public Health. His research and clinical work are focused on hepatitis C virus and hepatitis B virus, and the interactions with HIV. Dr. Thomas directed the Infectious Diseases Division at Johns Hopkins from 2006 to 2022 and has served the National Institutes of Health, Centers for Disease Control and Prevention, American Association of Liver Disease, Infectious Diseases Society of America, the Conference on Retroviruses and Associated Infections, the American Association of Physicians and the associated biomedical journals in multiple leadership/editorial capacities. Dr. Thomas is a member of American Society for Clinical Investigation (2001) and American Association of Physicians (2011), for which he served on Council. He received the Society Citation Award from Infectious Diseases Association of America (2014) and the Society Walter E. Stamm Mentor Award (2019) and also received the Provost’s Award for Excellence in Faculty Mentoring at the Johns Hopkins University (2019).