Winner of a 2007 Alfred I. DuPont-Columbia University Award for broadcast journalism, after more than two decades of stigma, research, and education, FRONTLINE presents the definitive chronicle of one of the worst pandemics ever known. Through interviews with researchers, activists, and patients, FRONTLINE investigates the science, politics and human cost of this disease, and asks: what has been learned, and what must be done to stop AIDS?

Note: This is part 1 of a series of 2 parts.