Authors: David R. Hill, MD, DTM&H (Chair); Charles D. Ericsson, Professor of Medicine, Head, Clinical Infectious Diseases, University of Texas Medical School at Houston, Department of Internal Medicine; Richard D. Pearson, Professor of Medicine and Pathology, Division of Infectious Diseases and International Health, University of Virginia School of Medicine; Jay S. Keystone, Professor of Medicine, University of Toronto, Staff Physician, Center for Travel and Tropical Medicine, Toronto General Hospital; David O. Freedman, Professor of Medicine and Epidemiology, Division of Geographic Medicine, University of Alabama at Birmingham; Phyllis E. Kozarsky, Professor of Medicine/Infectious Diseases, Chief, Travel and Tropical Medicine, Emory University School of Medicine, Expert Consultant, Division of Global Migration and Quarantine, Centers for Disease Control and Prevention, Atlanta The Emory Clinic; Herbert L. DuPont, Chief of Internal Medicine, St. Luke's Hospital, Director, Center for Infectious Diseases, University of Texas – Houston School of Public Health, Vice Chairman, Department of Medicine, Baylor College of Medicine; Frank J. Bia, Professor of Medicine and Laboratory Medicine, Co-Director – International Health Program, Yale School of Medicine; Philip R. Fischer, Professor of Pediatrics, Mayo Clinic, College of Medicine, Chair, Division of General Pediatric and Adolescent Medicine, Medical Director, Mayo Eugenio Litta Children's Hospital, Mayo Clinic; Edward T. Ryan, Director, Travelers' Advice and Immunization Center, Director, Tropical and Geographic Medicine Center, Associate Professor, Harvard Medical School, Tropical & Geographic Medicine Center, Division of Infectious Diseases, Massachusetts General Hospital