Yvonne J. Bryson, MD is a Professor of Pediatrics and Chief of Pediatric Infectious Diseases at the David Geffen School of Medicine at UCLA and UCLA Mattel Children’s Hospital and is the Director of the Los Angeles Brazil AIDS Consortium. She is a world-renown leader, researcher, virologist and clinician in the field of HIV pathogenesis, prevention and treatment of maternal-fetal and pediatric HIV-1, and is an active member of the Pediatric AIDS Clinical Trial Group. She is currently the Chair of the NIH Network IMPAACT (International Maternal Pediatric Adolescent AIDS Clinical Trials) PMTCT Committee (Prevention of Mother-to-Child Transmission of HIV). An invited member on the U.S. Public Health Service Task Force on the Use of Zidovudine to Reduce Perinatal Transmission of Human Immunodeficiency Virus, Dr. Bryson was influential in the development of CDC and Public Health guidelines for the diagnosis and treatment of HIV-infected pregnant women and has been involved in the planning and execution of national cooperative studies of maternal-fetal HIV transmission. She has made significant contributions to the development of some of the original studies of the use of Zidovudine for the prevention of perinatal HIV, studies of maternal risk factors for vertical transmission of HIV, as well as advances in the early diagnosis of HIV in newborns. Dr. Bryson has significant experience in leading large multicenter clinical trials and networks and developing clinical sites and laboratories. She is recognized as a national and international expert and leader in the field of HIV and perinatal transmission. She has made important and original scientific contributions to the field and served on many advisory committees and NIH Study Sections, and has been consistently funded by the National Institutes of Health, including numerous RO1 grants. Dr. Bryson has mentored numerous postdoctoral fellows and young faculty for successful careers in academic medicine. She was one of the original members of the Elizabeth Glaser Pediatric AIDS Foundation heath advisory board and helped start the foundation with Elizabeth, Dr. Richard Stiehm, and two co-founders. She has made a strong commitment to international studies and to her collaborators in Brazil to help them develop the necessary infrastructure to design, conduct, and implement new approaches to prevent and treat HIV. Dr. Bryson is a strong advocate for mothers and children with HIV. She is also an expert in general pediatrics, herpes infections, and other viral, bacterial, and opportunistic infections.