The MENTOR Initiative, Health Service Executive, affiliation not provided to SSRN, Health Service Executive, Health Service Executive, The Health Service Executive-Health Protection Surveillance Centre (HSE-HPSC), affiliation not provided to SSRN, affiliation not provided to SSRN, The Health Service Executive-Health Protection Surveillance Centre (HSE-HPSC), affiliation not provided to SSRN, Health Service Executive and affiliation not provided to SSRN

Epiconcept, Epiconcept, Carlos III Institute of Health - Communicable Diseases Department, National Institute for Public Health and the Environment (RIVM), Semmelweis University, National Institute of Health Doutor Ricardo Jorge, Public Health Agency of Sweden, Croatian Institute of Public Health, Cantacuzino National Military Medical Institute for Research and Development, Consejería de Sanidad - Dirección General de Salud Pública, Robert Koch Institute - Department for Infectious Disease Epidemiology, Sorbonne University - Institut Pierre Louis d'Épidémiologie et de Santé Publique IPLESP, Health Service Executive, Universidad Pública de Navarra - IdiSNA, Navarra Institute for Health Research, NIVEL (Netherlands Institute for Health Services Research), Semmelweis University, National Health Institute Doutor Ricardo Jorge (INSA) - National Influenza Reference Laboratory, Public Health Agency of Sweden, Croatian Institute of Public Health, Cantacuzino National Military Medical Institute for Research and Development, Consejería de Sanidad - Dirección General de Salud Pública, Robert Koch Institute, Université Paris Saclay, Health Service Executive, Instituto de Salud Pública y Laboral de Navarra, National Institute for Public Health and the Environment (RIVM), National Institute for Public Health and the Environment (RIVM), European Centre for Disease Prevention and Control, European Centre for Disease Prevention and Control and Epiconcept

Epiconcept, National Health Institute Doutor Ricardo Jorge (INSA) - Epidemiology Department, Carlos III Institute of Health - Communicable Diseases Department, Health Protection Surveillance Centre (HPSC), Sorbonne University - Institut Pierre Louis d'Épidémiologie et de Santé Publique IPLESP, Robert Koch Institute, National Institute for Public Health and the Environment (RIVM) - Centre for Infectious Disease Control, Epiconcept, Subdirección General de Epidemiología y Vigilancia de la Salud, Health Service Executive, University of Paris-Saclay - Institut Pasteur, Robert Koch Institute, National Institute for Public Health and the Environment (RIVM) - Centre for Infectious Disease Control, Murcia Regional Health Council-IMIB, University College Dublin (UCD), University of Corsica, Robert Koch Institute - Department for Infectious Disease Epidemiology, NIVEL (Netherlands Institute for Health Services Research), Croatian Institute of Public Health, Semmelweis University, National Health Institute Doutor Ricardo Jorge (INSA) - Epidemiology Department, Universidad Pública de Navarra - IdiSNA, Navarra Institute for Health Research, Cantacuzino National Military Medical Institute for Research and Development, Public Health Agency of Sweden, National Health Institute Doutor Ricardo Jorge (INSA) - Bioinformatics Unit, European Centre for Disease Prevention and Control, European Centre for Disease Prevention and Control and Epiconcept