2026-06-14T03:29:57Zhttps://repisalud.isciii.es/rest/oai/request

oai:repisalud.isciii.es:20.500.12105/97732024-09-27T18:10:55Zcom_20.500.12105_2052com_20.500.12105_2051col_20.500.12105_19608

00925njm 22002777a 4500 dc Valenciano, Marta author Kissling, Esther author Larrauri, Amparo author Nunes, Baltazar author Pitigoi, Daniela author O'Donnell, Joan author Reuss, Annicka author Horváth, Judit Krisztina author Paradowska-Stankiewicz, Iwona author Rizzo, Caterina author Falchi, Alessandra author Daviaud, Isabelle author Brytting, Mia author Meijer, Adam author Kaic, Bernard author Gherasim, Alin Manuel author Machado, Ausenda author Ivanciuc, Alina author Domegan, Lisa author Schweiger, Brunhilde author Ferenczi, Annamária author Korczyńska, Monika author Bella, Antonino author Vilcu, Ana-Maria author Mosnier, Anne author Zakikhany, Katherina author de Lange, Marit author Kurečić Filipovićović, Sanja author Johansen, Kari author Moren, Alain author 2018 BACKGROUND: Results of previous influenza vaccination effects on current season influenza vaccine effectiveness (VE) are inconsistent. OBJECTIVES: To explore previous influenza vaccination effects on current season VE among population targeted for vaccination. METHODS: 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. RESULTS: 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%). CONCLUSIONS: We did not identify any pattern of previous influenza vaccination effect. Prospective cohort studies documenting influenza infections, vaccinations and vaccine types are needed to understand previous influenza vaccinations' effects. Influenza Other Respir Viruses. 2018 Sep;12(5):567-581. 10.1111/irv.12562 1750-2659 1750-2640 Influenza and other respiratory viruses 29659149 http://hdl.handle.net/20.500.12105/9773 Case-control study Influenza Influenza vaccine Multicentre study Vaccine effectiveness Exploring 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