Department of Applied Mathematics and Theoretical Physics, University of Cambridge, Cambridge, United Kingdom, Fogarty International Center, National Institutes of Health, Bethesda, Maryland, United States of America.|Department of Ecology and Evolutionary Biology, Princeton University, Princeton, New Jersey, United States of America.|Fogarty International Center, National Institutes of Health, Bethesda, Maryland, United States of America.|Fogarty International Center, National Institutes of Health, Bethesda, Maryland, United States of America, Department of Global Health, George Washington University, Washington, D.C., United States of America.|Fogarty International Center, National Institutes of Health, Bethesda, Maryland, United States of America, Department of Entomology, Pennsylvania State University, State College, Pennsylvania, United States of America.|Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, New York, United States of America.|Center for Statistics and Quantitative Infectious Diseases, Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, Washington, United States of America.|IMS Health, Plymouth Meeting, Pennsylvania, United States of America.|Fogarty International Center, National Institutes of Health, Bethesda, Maryland, United States of America, Department of Ecology and Evolutionary Biology, Princeton University, Princeton, New Jersey, United States of America.