Richard Littleton Guerrant is Professor of Medicine at the University of Virginia, and Founding Director of its Trans-University Center for Global Health. Elected to the National Academy of Medicine, he chaired its Board of Global Health. His research focuses on ameliorating the long-term impact of diarrhea and gut infections in developing countries. He has edited seven books, including Tropical Infectious Diseases and At the Edge of Development, and authored over 670 papers. He formerly served as President of American Society of Tropical Medicine and Hygiene and is the recipient of its Walter Reed Medal.