1. Department of Health Emergency Information and Risk Assessment, World Health Organization, Avenue Appia 20, 1211 Geneva, Switzerland
2. Faculty of Medicine, University of Geneva, 1 rue Michel-Servet, 1211 Geneva, Switzerland
3. Department of Infectious Disease Epidemiology, School of Public Health, MRC Centre for Global Infectious Disease Analysis, Imperial College London, Medical School Building, St Mary's Campus, Norfolk Place London W2 1PG, UK
4. Department of Infectious Hazard Management, World Health Organization, Avenue Appia 20, 1211 Geneva, Switzerland
5. Department of Infectious Disease Epidemiology, London School of Hygiene and Tropical Medicine, Keppel St, London WC1E 7HT, UK
6. Centre for Mathematical Modelling of Infectious Diseases, London School of Hygiene and Tropical Medicine, Keppel St, London WC1E 7HT, UK
7. UK Public Health Rapid Support Team, London School of Hygiene and Tropical Medicine, Keppel St, London WC1E 7HT, UK
8. Public Health England, Wellington House, 133–155 Waterloo Road, London SE1 8UG, UK
9. Clinical Research Department, Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, Keppel St, London WC1E 7HT, UK
10. Centre for Health Informatics, Computing and Statistics (CHICAS), Lancaster Medical School, Lancaster University, Lancaster LA1 4YW, UK
11. School of Life Sciences, University of Sussex, Sussex House, Brighton BN1 9RH, UK