Diane Havlir, MD, is chief of the HIV/AIDS division and Positive Health Program at San Francisco General Hospital and professor of medicine at the University of California, San Francisco. Diane was a physician in training when the AIDS epidemic emerged in the 1980s and has cared for HIV-infected patients in the clinic and hospital ever since. She has conducted clinical research in HIV and co-infections for over 25 years, with over 200 publications. Dr. Havlir conducted the first pivotal study showing the protective effect of azithromycin against M. avium infections for persons with AIDS, numerous studies on antiretroviral therapy and drug resistance, and a recent international study demonstrating the beneficial effect of starting antiretroviral therapy early in persons with HIV and tuberculosis. She is currently leading a community randomized study in East Africa (SEARCH) measuring the health, economic, and education effects of testing and treating all HIV-infected persons.