Lynne M. Mofenson, M.D., is an infectious disease specialist and board-certified pediatrician who joined the MPIDB in 1989, when it was the Pediatric and Maternal AIDS Branch, and retired from the Branch in 2014. She received her M.D. from Albert Einstein College of Medicine with honors (Alpha Omega Alpha). Dr. Mofenson served as Branch Chief, responsible for overall program planning and the development and scientific direction of research studies and clinical trials in domestic and international pediatric, adolescent, and maternal HIV infection, disease, and AIDS, for many years until her retirement in 2014. She was also project officer for the NICHD-funded multi-site Domestic and International Pediatric/Perinatal HIV Clinical Studies Network, which conducts clinical trials in treatment and management of HIV infection in infants, children, adolescents, and women both domestically and internationally, often in collaboration with other Networks, such as the Pediatric AIDS Clinical Trials Group funded by the NIAID, the Adolescent Trials Network and the Pediatric European Network for Treatment of AIDS. She served as Executive Secretary for the U.S. Public Health Service guidelines for treatment of HIV-infected children, treatment of HIV-infected pregnant women and prevention of mother to child HIV transmission, and provided consultation to the World Health Organization on treatment guidelines in resource-limited countries.