Anne A. Gershon, MD, Professor of Pediatrics, Division of Infectious Diseases, Columbia University, College of Physicians and Surgeons, New York, New York; Peter J. Hotez, MD, PhD, Professor and Chair, Department of Microbiology and Tropical Medicine, Professor of Global Health, Epidemiology, International Affairs and Human Sciences, The George Washington University, Washington, DC; and Samuel Katz, MD, Wilbert C. Davison Professor and Chairman Emeritus, Department of Pediatrics, Duke University Medical Center Durham, North Carolina