Dr. Jaffe is an internationally recognized scientist and public health leader, and is currently the Associate Director for Science at the Centers for Disease Control. In 1981, he joined a CDC task force investigating a new disease, soon to become known as AIDS. He led the first national case-control study to determine risk factors for the disease and the first natural history study of HIV. Over the next two decades he served in leadership positions in the CDC′s expanding HIV/AIDS programs, including Director of the Division of HIV/AIDS, Director of the Division of AIDS, STD, and TB Laboratory Research, and Director of the National Center for HIV, STD, and TB Prevention. Dr. Jaffe is a member of the Institute of Medicine of The National Academies, the Infectious Diseases Society of America, and has been a Fellow of the UK Faculty of Public Health.