About the Authors
Center for Infectious Disease Dynamics, Department of Biology, The Pennsylvania State University, University Park, Pennsylvania, United States of America
Oxford University Clinical Research Unit, Hospital for Tropical Diseases, Ho Chi Minh City, Viet Nam
Fogarty International Center, National Institutes of Health, Bethesda, Maryland, United States of America
The authors have declared that no competing interests exist.
Conceived and designed the experiments: MAR JF CPS ECH. Performed the experiments: VTTH BW. Analyzed the data: MAR. Wrote the paper: MAR JF CPS ECH.