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dc.contributor.authorValenciano, Marta
dc.contributor.authorKissling, Esther
dc.contributor.authorLarrauri, Amparo
dc.contributor.authorNunes, Baltazar
dc.contributor.authorPitigoi, Daniela
dc.contributor.authorO'Donnell, Joan
dc.contributor.authorReuss, Annicka
dc.contributor.authorHorváth, Judit Krisztina
dc.contributor.authorParadowska-Stankiewicz, Iwona
dc.contributor.authorRizzo, Caterina
dc.contributor.authorFalchi, Alessandra
dc.contributor.authorDaviaud, Isabelle
dc.contributor.authorBrytting, Mia
dc.contributor.authorMeijer, Adam
dc.contributor.authorKaic, Bernard
dc.contributor.authorGherasim, Alin
dc.contributor.authorMachado, Ausenda
dc.contributor.authorIvanciuc, Alina
dc.contributor.authorDomegan, Lisa
dc.contributor.authorSchweiger, Brunhilde
dc.contributor.authorFerenczi, Annamária
dc.contributor.authorKorczyńska, Monika
dc.contributor.authorBella, Antonino
dc.contributor.authorVilcu, Ana-Maria
dc.contributor.authorMosnier, Anne
dc.contributor.authorZakikhany, Katherina
dc.contributor.authorde Lange, Marit
dc.contributor.authorKurečić Filipovićović, Sanja
dc.contributor.authorJohansen, Kari
dc.contributor.authorMoren, Alain
dc.descriptionResults of previous influenza vaccination effects on current season in-fluenza vaccine effectiveness (VE) are inconsistent.en_US
dc.description.abstractResults of previous influenza vaccination effects on current season influenza vaccine effectiveness (VE) are inconsistent. To explore previous influenza vaccination effects on current season VE among population targeted for vaccination. We used 2011/2012 to 2016/2017 I-MOVE primary care multicentre test-negative data. For each season, we compared current season adjusted VE (aVE) between individuals vaccinated and unvaccinated in previous season. Using unvaccinated in both seasons as a reference, we then compared aVE between vaccinated in both seasons, current only, and previous only. We included 941, 2645 and 959 influenza-like illness patients positive for influenza A(H1N1)pdm09, A(H3N2) and B, respectively, and 5532 controls. In 2011/2012, 2014/2015 and 2016/2017, A(H3N2) aVE point estimates among those vaccinated in previous season were -68%, -21% and -19%, respectively; among unvaccinated in previous season, these were 33%, 48% and 46%, respectively (aVE not computable for influenza A(H1N1)pdm09 and B). Compared to current season vaccination only, VE for both seasons' vaccination was (i) similar in two of four seasons for A(H3N2) (absolute difference [ad] 6% and 8%); (ii) lower in three of four seasons for influenza A(H1N1)pdm09 (ad 18%, 26% and 29%), in two seasons for influenza A(H3N2) (ad 27% and 39%) and in two of three seasons for influenza B (ad 26% and 37%); (iii) higher in one season for influenza A(H1N1)pdm09 (ad 20%) and influenza B (ad 24%).
dc.publisherInfluenza and other Respiratory Virusesen_US
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 United States*
dc.subjectcase-control studyen_US
dc.subjectinfluenza vaccineen_US
dc.subjectmulticentre studyen_US
dc.subjectvaccine effectivenessen_US
dc.titleExploring the effect of previous inactivated influenza vaccination on seasonal influenza vaccine effectiveness against medically attended influenza: Results of the European I-MOVE multicentre test-negative case-control study, 2011/2012-2016/2017.en_US
dc.identifier.journalInfluenza and other Respiratory Virusesen_US
dc.source.journaltitleInfluenza and other respiratory viruses

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