Joel G. Breman, MD, DTPH, served as Senior Scientist Emeritus at Fogarty International Center, National Institutes of Health, and Professorial Lecturer, Epidemiology at Milken Institute School of Public Health, George Washington University until his passing in April 2024. Dr. Breman was the Centers for Disease Control and Prevention (CDC) principal advisor to the Guinean Smallpox Eradication-Measles Control Program from 1967-1969. From 1972-1976 he was Chief of the Epidemiology Section for the Organisation de Coordination et de Coopération pour la lutte contre le Grandes Endémies (OCCGE), based in Burkina Faso. Dr. Breman was educated at the University of California, Los Angeles; Keck School of Medicine, University of Southern California (USC); and the London School of Hygiene and Tropical Medicine. He trained in internal medicine at the USC-Los Angeles County Medical Center, in infectious diseases at the Channing Laboratory, Boston City Hospital, Harvard Medical School, and in epidemiology at the CDC, where he was an Epidemic Intelligence Service Officer. Dr Breman was President of the American Society of Tropical Medicine and Hygiene from 2019 to 2020. Jon Kim Andrus, MD, FAAFP, is Professor of Global Health at George Washington University's Department of Global Health in the Milken Institute of Public Health. Dr. Andrus leads efforts to advocate for the evidence-based use of vaccines in developing countries. Dr. Andrus also serves as Adjunct Professor and Director of the Division of Vaccines and Immunization of the University of Colorado's Center for Global Health.