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Dr.John D. Clemens, M.D.
 
John D. Clemens, M.D., Director General of the International Vaccine Institute, is an international expert on vaccine evaluation in developing countries. He is a graduate of Stanford University and Yale University School of Medicine. For five years, Dr. Clemens was a Research Scientist at the International Center for Diarrhoeal Disease Research, Bangladesh. Before joining the International Vaccine Institute, he held senior positions at the United States National Institutes of Health, where he was Chief of the Epidemiology Branch and Chief of the Section on Pediatric Infectious Diseases and Vaccinology of the National Institute of Child Health and Human Development. He has been a long-term advisor to WHO.
He has a continuing appointment as an adjunct professor at Johns Hopkins University and at Seoul National University. Dr. Clemens has successfully undertaken numerous vaccine research projects in developing countries. His past research in Asia has included projects in Bangladesh, China, India, Indonesia, Mozambique, Pakistan, Thailand, and Vietnam. He has published over 200 papers in peer-reviewed journals and is an expert both on vaccines against enteric infections and on methodological approaches for vaccine evaluations. He is also on the editorial boards of several scientific journals, including the American Journal of Epidemiology. Dr. Clemens has pioneered methods for the conceptualization, design, implementation, and evaluation of effectiveness trials of new vaccines.