David A. Sack, MD, the director of the DOVE project, is a professor in the Department of International Health at Johns Hopkins Bloomberg School of Public Health and has spent his career devoted to the control of infectious diarrheal diseases like cholera, rotavirus, and diarrhea due to enterotoxigenic E. coli. He obtained his medical degree from Oregon Health and Sciences University and trained in internal medicine at the University of Iowa and in infectious diseases at Johns Hopkins University. During his career, he spent 15 years in Bangladesh conducting research at the International Centre for Diarrhoeal Disease Research, Bangladesh, (icddr,b) including 8 years as its executive director. While at the icddr,b he accepted the first Gates Award for Global Health on behalf of the Centre in 2001. In addition to directing the DOVE project, he is also head of the Enteric Laboratory at the Johns Hopkins University Center for Immunization Research, which carries out clinical trials of new enteric vaccines. He has authored more than 300 articles and serves on advisory committees for the National Institutes of Health, the World Health Organization, the International Vaccine Institute, and the Program for Appropriate Technology in Health (PATH).