Dr. Robert R. Redfield MD is the Director of the Centers for Disease Control and Prevention and Administrator of the Agency for Toxic Substances and Disease Registry. He has been a public health leader actively engaged in clinical research and clinical care of chronic human viral infections and infectious diseases for more than 30 years. Dr. Redfield served as a member of the President’s Advisory Council on HIV/AIDS from 2005 to 2009, and was appointed as Chair of the International Subcommittee from 2006 to 2009.