1. Department of Disease Control and Environmental Health, School of Public Health, Makerere University , 7072, Kampala , Uganda
2. Department of Infectious Disease Epidemiology, Bernhard Nocht Institute of Tropical Medicine , D-20359, Hamburg , Germany
3. Ministry of Health, Republic of Uganda , 7272, Kampala , Uganda
4. Disease Dynamics Unit, Department of Veterinary Medicine, University of Cambridge , CB3 0ES, Cambridge, UK