Robert R. Redfield, MD, is the 18th Director of the Centers for Disease Control and Prevention and Administrator of the Agency for Toxic Substances and Disease Registry. He has been actively engaged in clinical research and care of chronic human viral infections and infectious diseases, especially HIV, for over 30 years. Redfield served as the founding director of the Department of Retroviral Research within the U.S. Military’s HIV Research Program, co-founded the University of Maryland’s Institute of Human Virology and served as the Chief of Infectious Diseases and Vice Chair of Medicine at the University of Maryland School of Medicine. Dr. Redfield has demonstrated the importance of heterosexual transmission of HIV, contributing to early scientific understanding of the virus. Dr. Redfield served as a member of the President’s Advisory Council on HIV/AIDS from 2005 to 2009 and as Chair of the International Subcommittee from 2006 to 2009. Redfield has contributed to HIV/AIDS research and treatment around the world.