Martínez-Baz, IvánCasado, ItziarMiqueleiz, AnaNavascués, AnaPozo Sanchez, FranciscoTrobajo-Sanmartín, CaminoAlbéniz, EstherElía, FernandoBurgui, CristinaFernández-Huerta, MiguelEzpeleta, CarmenCastilla Catalán, Jesús2023-05-052023-05-052022-06Euro Surveill. 2022 Jun;27(26):2200488.http://hdl.handle.net/20.500.12105/15978Compared with individuals unvaccinated in the current and three previous influenza seasons, in 2021/22, influenza vaccine effectiveness at primary care level was 37% (95% CI: 16 to 52) for current season vaccination, regardless of previous doses, and 35% (95% CI: -3 to 45) for only previous seasons vaccination. Against influenza A(H3N2), estimates were 39% (95% CI: 16 to 55) and 24% (95% CI: -8 to 47) suggesting moderate effectiveness of current season vaccination and possible remaining effect of prior vaccinations.engVoRhttp://creativecommons.org/licenses/by/4.0/Acute respiratory infectionCase-control studyInfluenzaInfluenza vaccineRepeated vaccinationVaccine effectivenessInfluenza VaccinesInfluenza, HumanCase-Control StudiesHumansInfluenza A Virus, H3N2 SubtypePrimary Health CareSeasonsSpainVaccinationAtribución 4.0 Internacional357754282726220048810.2807/1560-7917.ES.2022.27.26.22004881560-7917Euro surveillance : bulletin Europeen sur les maladies transmissibles = European communicable disease bulletinopen access