Castilla Catalán, JesúsNavascués, AnaCasado, ItziarDíaz-González, JorgePérez-García, AlejandraFernandino, LeticiaMartínez-Baz, IvánAguinaga, AitziberPozo Sanchez, FranciscoEzpeleta, Carmen2019-06-042019-06-042017-02Euro Surveill. 2017 Feb;22(7).1025-496Xhttp://hdl.handle.net/20.500.12105/7723The 2016/17 mid-season vaccine effectiveness estimate against influenza A(H3N2) was 15% (95% confidence interval: -11 to 35) in Navarre. Comparing to individuals unvaccinated in the current and four prior seasons, effectiveness was 24% for current and 3-4 prior doses, 61% for current and 1-2 prior doses, 42% for only current vaccination, and 58% for 3-4 prior doses. This suggests moderate effectiveness for different combinations of vaccination in the current and prior seasons.engVoRhttp://creativecommons.org/licenses/by-nc-sa/4.0/Case control studyInfluenzaInfluenza vaccineInfluenza-like illnessRepeated vaccinationVaccine effectivenessAdolescentAdultAgedChildHumansInfluenza A Virus, H3N2 SubtypeInfluenza VaccinesVaccinationYoung AdultAtribución-NoComercial-CompartirIgual 4.0 Internacional2823052322710.2807/1560-7917.ES.2017.22.7.304651560-7917Eurosurveillanceopen access