1. Epidemiology and Demography Department, Kenya Medical Research Institute–Wellcome Trust Research Programme, Centre for Geographic Medicine Research–Coast
2. Department of Nursing and Public Health, Pwani University, Kilifi, Kenya
3. High Containment Microbiology, Public Health England, Salisbury
4. Department of Global Health and Development, London School of Hygiene and Tropical Medicine, University of London
5. School of Life Sciences and Zeeman Institute for Systems Biology and Infectious Disease Epidemiology Research, University of Warwick, Coventry, United Kingdom