1. EpiConcept, Paris, France
2. National Centre of Epidemiology, Institute of Health Carlos III, Madrid, Spain
3. CIBER Epidemiología y Salud Pública, Institute of Health Carlos III, Madrid, Spain
4. Instituto de Salud Pública de Navarra, IdiSNA, Pamplona, Spain
5. Istituto Superiore di Sanità, Rome, Italy
6. UMF Carol Davila, INC Cantacuzino, Bucharest, Romania
7. Inserm, F-CRIN, Innovative clinical research network in vaccinology (I-REIVAC), Paris, France
8. Université Paris Descartes, Sorbonne Paris Cité, APHP, CIC Cochin-Pasteur, Paris, France
9. Impact Assessment Unit, National Institute for Health and Welfare, Tampere, Finland
10. Department of Infectious diseases, Lithuanian University of Health Sciences, Kaunas, Lithuania
11. Epidemiology Research Unit, Epidemiology Department, National Health Institute Dr Ricardo Jorge, Lisbon, Portugal
12. Epidemiology Service, Croatian Institute of Public Health, Zagreb, Croatia
13. Office of the Chief Medical Officer, Budapest, Hungary
14. National institute of Public Health - National Institute of Hygiene, Department of Epidemiology, Warsaw, Poland
15. Centre for Epidemiology and surveillance of infectious diseases, Centre for infectious disease control, National Institute for Public Health and the Environment (RIVM), Bilthoven, The Netherlands
16. INC Cantacuzino, Bucharest, Romania
17. CIC de Montpellier, Hôpital Saint-Eloi, CHU de Montpellier, Montpellier, France
18. Viral Infections Unit, National Institute for Health and Welfare, Helsinki, Finland