Department of Epidemiology, Harvard School of Public Health, Boston, Massachusetts, United States of America, Center for Communicable Disease Dynamics, Harvard School of Public Health, Boston, Massachusetts, United States of America.|Department of Medicine, Duke University and Duke Global Health Institute, Durham, North Carolina, United States of America.|Department of Epidemiology, Harvard School of Public Health, Boston, Massachusetts, United States of America, College of Computer and Information Science, Northeastern University, Boston, Massachusetts, United States of America.|Department of Geography and Environment, University of Southampton, Southampton, United Kingdom, Fogarty International Center, National Institutes of Health, Bethesda, Maryland, United States of America.|Department of Epidemiology, Harvard School of Public Health, Boston, Massachusetts, United States of America, Center for Communicable Disease Dynamics, Harvard School of Public Health, Boston, Massachusetts, United States of America.