1. Surveillance and Response Support, European Centre for Disease Prevention and Control (ECDC), Solna, Sweden
2. Bruno Hubert, Santé Public France, Saint-Maurice Cedex, France
3. National Centre of Epidemiology, CIBER Epidemiología y Salud Pública, Institute of Health Carlos III (ISCIII), Madrid, Spain
4. The Public Health Agency of Sweden, Solna, Sweden
5. National Institute of Public Health, Romania National Centre for Communicable Diseases Surveillance and Control, Bucuresti, Romania
6. Health Service Executive-Health Protection Surveillance Centre, Dublin, Ireland
7. National Institute for Public Health and the Environment (RIVM), Bilthoven, The Netherlands
8. Department of Infectious Diseases Epidemiology, National Institute of Public Health, Prague, Czech Republic
9. Instituto Nacional de Saúde Doutor Ricardo Jorge (National Institute of Health Dr. Ricardo Jorge), Lisboa, Portugal
10. Department of Public Health of Regional Health Administration of Lisbon and Tagus Valley, Lisboa, Portugal
11. Medical University of Vienna, Center for Virology, Vienna, Austria
12. Public Health Authority of the Slovak Republic, Bratislava, Slovakia
13. Infectious Disease Prevention and Control Unit, Health Regulation, Malta
14. Department of Health Security, National Institute for Health and Welfare (THL), Helsinki, Finland
15. Office of the Chief Scientist, European Centre for Disease Prevention and Control (ECDC), Solna, Sweden