, Seasonal influenza vaccination and antiviral use in Europe. Overview of vaccination recommendations and coverage rates in the EU Member States for the 2013-14 and 2014-15 influenza seasons. VENICE technical report

B. Hakin, P. Cosford, and F. Harvey, The flu immunisation programme 2013/14-extension to children. London: Department of Health, 2013.

, Recommended composition of influenza virus vaccines for use in the 2017-2018 northern hemisphere influenza season. Geneva: WHO, 2017.

, European Centre for Disease Prevention and Control (ECDC), World Health Organization Regional Office for Europe (WHO/ Europe), vol.7, pp.12-18, 2018.

, Stockholm: ECDC, Copenhagen: WHO/Europe, 2018.

I. , Protocol for hospital-based test negative case control studies to measure seasonal influenza vaccine effectiveness against influenza laboratory confirmed SARI hospitalisation among the elderly across the European Union and European Economic Area Member States. Paris: EpiConcept, 2016.

, Protocol for case control studies to measure pandemic and seasonal vaccine effectiveness in the European Union and European Economic Area. Stockholm: ECDC, 2009.

M. Control_studies,

S. Jimenez-jorge, S. De-mateo, C. Delgado-sanz, F. Pozo, I. Casas et al., Estimating influenza vaccine effectiveness in Spain using sentinel surveillance data, Euro Surveill, vol.20, issue.28, p.26212144, 2015.

R. Pebody, F. Warburton, J. Ellis, N. Andrews, A. Potts et al., Effectiveness of seasonal influenza vaccine for adults and children in preventing laboratory-confirmed influenza in primary care in the United Kingdom: 2015/16 end-of-season results, Euro Surveill, vol.21, issue.38, p.27684603, 2016.

H. D. Emborg, T. G. Krause, L. Nielsen, M. K. Thomsen, C. B. Christiansen et al., Influenza vaccine effectiveness in adults 65 years and older, Denmark, 2015/16-a rapid epidemiological and virological assessment, Euro Surveill, vol.21, issue.14, p.27101732, 2016.

L. Rodrigues and B. R. Kirkwood, Case-control designs in the study of common diseases: updates on the demise of the rare disease assumption and the choice of sampling scheme for controls

, Int J Epidemiol, vol.19, issue.1, p.2190942, 1990.

P. Peduzzi, J. Concato, E. Kemper, T. R. Holford, and A. R. Feinstein, A simulation study of the number of events per variable in logistic regression analysis, J Clin Epidemiol, vol.49, issue.12, p.8970487, 1996.

E. A. Belongia, M. D. Simpson, J. P. King, M. E. Sundaram, N. S. Kelley et al., Variable influenza vaccine effectiveness by subtype: a systematic review and meta-analysis of testnegative design studies, Lancet Infect Dis, vol.16, issue.8, p.27061888, 2016.

E. Kissling, M. Valenciano, F. Pozo, A. Vilcu, A. Reuss et al., /16 I-MOVE/I-MOVE+ multicentre case control study in Europe: moderate vaccine effectiveness estimates against influenza A(H1N1)pdm09 and low estimates against lineage mismatched influenza B among children. Influenza Other Respir Viruses, p.29125681, 2015.
URL : https://hal.archives-ouvertes.fr/hal-02102565

, Recommended composition of influenza virus vaccines for use in the 2016-2017 northern hemisphere influenza season. Geneva: WHO, 2016.

M. Rondy, A. Gherasim, I. Casado, O. Launay, C. Rizzo et al., Low 2016/17 season vaccine effectiveness against hospitalised influenza A(H3N2) among elderly: awareness warranted for 2017/18 season, Euro Surveill, vol.22, issue.41, p.29043961, 2017.
URL : https://hal.archives-ouvertes.fr/hal-01628517

S. G. Sullivan, M. B. Chilver, K. S. Carville, Y. Deng, K. A. Grant et al., Low interim influenza vaccine effectiveness, Euro Surveill, vol.22, issue.43, p.29090681, 2017.

D. M. Skowronski, C. Chambers, D. Serres, G. Dickinson, J. A. Winter et al., Early season co-circulation of influenza A(H3N2) and B(Yamagata): interim estimates of 2017/18 vaccine effectiveness, Canada, Euro Surveill, vol.23, issue.5, p.29409570, 2018.

, Recommended composition of influenza virus vaccines for use in the 2018-2019 northern hemisphere influenza season. Geneva: WHO, 2018.

M. Rondy, E. Omeiri, N. Thompson, M. G. Levêque, A. Moren et al., Effectiveness of influenza vaccines in preventing severe influenza illness among adults: A systematic review and meta-analysis of test-negative design case-control studies, J Infect, vol.75, issue.5, p.28935236, 2017.

. Public-health-england, Summary of data to support the choice of influenza vaccination for adults in primary care, 2018.

B. Flannery, J. R. Chung, E. A. Belongia, H. Q. Mclean, M. Gaglani et al., Interim Estimates of 2017-18 Seasonal Influenza Vaccine Effectiveness-United States, MMWR Morb Mortal Wkly Rep, vol.67, issue.6, p.29447141, 2018.

J. Castilla, A. Navascués, I. Casado, A. Pérez-garcía, A. Aguinaga et al., Interim effectiveness of trivalent influenza vaccine in a season dominated by lineage mismatched influenza B, northern Spain, Euro Surveill, vol.23, issue.18, p.29471624, 2017.

D. M. Skowronski, N. Z. Janjua, S. Sabaiduc, D. Serres, G. Winter et al., Influenza A/subtype and B/lineage effectiveness estimates for the 2011-2012 trivalent vaccine: cross-season and cross-lineage protection with unchanged vaccine, J Infect Dis, vol.210, issue.1, p.24446529, 2014.

M. Rondy, A. Larrauri, I. Casado, V. Alfonsi, D. Pitigoi et al., /16 seasonal vaccine effectiveness against hospitalisation with influenza A(H1N1)pdm09 and B among elderly people in Europe: results from the I-MOVE+ project, Euro Surveill, vol.22, issue.30, p.30580, 2015.
URL : https://hal.archives-ouvertes.fr/hal-02103126

A. C. Tricco, A. Chit, C. Soobiah, D. Hallett, G. Meier et al., Comparing influenza vaccine efficacy against mismatched and matched strains: a systematic review and meta-analysis, BMC Med, vol.11, issue.1, p.23800265, 2013.

C. A. Diazgranados, M. Denis, and S. Plotkin, Seasonal influenza vaccine efficacy and its determinants in children and nonelderly adults: a systematic review with meta-analyses of controlled trials, Vaccine, vol.31, issue.1, p.23142300, 2012.

, European Centre for Disease Prevention and Control (ECDC), 2018.

S. Impfkommission, Wissenschaftliche Begründung für die Empfehlung des quadrivalenten saisonalen Influenzaimpfstoffs. [Scientific reason for recommending the quadrivalent seasonal influenza vaccine, Epidemiologisches Bulletin, vol.2, 2018.

E. A. Belongia, D. M. Skowronski, H. Q. Mclean, C. Chambers, M. E. Sundaram et al., Repeated annual influenza vaccination and vaccine effectiveness: review of evidence, Expert Rev Vaccines, vol.16, issue.7, p.28562111, 2017.

M. Rondy, O. Launay, J. Castilla, S. Costanzo, J. Puig-barberà et al., Repeated seasonal influenza vaccination among elderly in Europe: Effects on laboratory confirmed hospitalised influenza, Vaccine, vol.35, issue.34, p.28709555, 2017.

, Expert opinion on neuraminidase inhibitors for the prevention and treatment of influenza-review of recent systematic reviews and meta-analyses. Stockholm: ECDC, 2017.