Dr. Rochelle Walensky served as the 19th Director of the Centers for Disease Control and Prevention (2021-23), Professor of Medicine, Harvard Medical School (2012-2021), and Chief of the Division of Infectious Diseases, Massachusetts General Hospital (2017-2021). Dr. Walensky is an infectious disease clinician whose research career is guided by a belief that the clinical and economic outcomes of medical decisions can be improved through the explicit articulation of choices, the systematic assembly of evidence, and the careful assessment of comparative costs and benefits. She has focused these beliefs on mathematical model-based research toward the promotion of global access to HIV prevention, screening, and care. Her ground-breaking work and over 300 research publications have motivated changes to US HIV testing and immigration policy; promoted expanded funding for HIV-related research, treatment, and the President’s Emergency Plan for AIDS Relief (PEPfAR); and led to policy revisions toward aggressive HIV screening – especially for the underserved – and earlier treatment in resource-limited international settings. In light of these contributions, Dr. Walensky has been an active member of policy discussions at the WHO, UNAIDS, the DHHS HIV Guidelines Committee, and the NIH Office of AIDS Research.