Dr. Mofenson received her medical degree from Albert Einstein College of Medicine with honors in 1977. She completed as pediatric residency at Boston Childrens Hospital, followed by Pediatric Chief Residency and an adult/pediatric infectious disease fellowship at the University of Massachusetts Medical School. She is currently Chief, Pediatric, Adolescent & Maternal AIDS Branch at the Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, where she has worked since 1989. Dr. Mofenson is responsible for program planning and development and scientific direction of research studies and clinical trials in domestic and international pediatric, adolescent and maternal HIV infection and disease. She has published and lectured extensively on issues related to perinatal HIV transmission and prevention and on treatment of pediatric and adolescent HIV infection. She is Executive Secretary for the U.S. guidelines on prevention of mother to child HIV transmission as well as guidelines on treatment of pediatric HIV infection and opportunistic infections. She is a consultant to international organizations such as the World Health Organization on policies related to antiretroviral treatment and prevention of HIV infection in of children, adolescents and women.