Carlos III Institute of Health - Communicable Diseases Department, Carlos III Institute of Health - CIBER de Epidemiología y Salud Pública (CIBERESP), Madrid Ministry of Health - Vaccines Division, Carlos III Institute of Health - Communicable Diseases Department, Madrid Ministry of Health - Centre for the Coordination of Health Alerts and Emergencies, Madrid Ministry of Health - Vaccines Division, Spanish Agency for Medicines and Medical Devices (AEMPS), Carlos III Institute of Health - Communicable Diseases Department and Harvard University - CAUSALab

Epiconcept, National Institute of Health Doutor Ricardo Jorge, Epiconcept, Carlos III Institute of Health - Communicable Diseases Department, Robert Koch Institute, Health Service Executive, Semmelweis University, Sorbonne University - Institut Pierre Louis d'Épidémiologie et de Santé Publique IPLESP, National Health Institute Doutor Ricardo Jorge (INSA) - Epidemiology Department, Universidad Pública de Navarra - IdiSNA, Navarra Institute for Health Research, National Institute for Public Health and the Environment (RIVM) - Centre for Infectious Disease Control, Croatian Institute of Public Health, Public Health Agency of Sweden, Romanian Institute of Science and Technology - National Institute of Research and Development for Microbiology and Immunology „Cantacuzino”, Carlos III Health Institute, Robert Koch Institute, University College Dublin (UCD), Semmelweis University, University of Paris-Saclay - Laboratoire de Microbiologie, National Health Institute Doutor Ricardo Jorge (INSA) - National Influenza Reference Laboratory, Instituto de Salud Pública y Laboral de Navarra, NIVEL (Netherlands Institute for Health Services Research), Croatian Institute of Public Health, Public Health Agency of Sweden, National Institute for Public Health and the Environment (RIVM), National Health Institute Doutor Ricardo Jorge (INSA) - Bioinformatics Unit, Consejería de Sanidad, European Centre for Disease Prevention and Control, European Centre for Disease Prevention and Control and Epiconcept