Charles W. Flexneris Professor of Medicine in the Divisions of Clinical Pharmacology and Infectious Diseases, and Professor of Pharmacology and Molecular Sciences at the Johns Hopkins University School of Medicine. He is also Professor of International Health at the Bloomberg School of Public Health. Dr. Flexner is an expert on the basic and clinical pharmacology of drugs for HIV/AIDS and related infections, including viral hepatitis and tuberculosis. His scientific contributions include work on the important roles of pharmacokinetic enhancement, medication adherence, and dosing frequency in the long-term management of HIV/AIDS. He has published extensively on anti-infective drug transport and metabolism, and metabolic drug interactions. His current research includes the discovery and development of new molecules and formulations for long-acting parenteral administration for treatment and prevention of HIV infection. He directs the Long Acting/Extended Release Antiretroviral Research Resource Program (LEAP; www.longactinghiv.org), and the Johns Hopkins Baltimore-Washington-India Clinical Trials Unit. He is a member of the editorial board of 11 scientific journals. He is a consultant to the Bill and Melinda Gates Foundation and the Clinton Health Access Initiative, and serves on the WHO Clinical Guidelines Development Group for Treatment and Prevention of HIV in Adults, Adolescents, and Children.