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Interim effectiveness of trivalent influenza vaccine in a season dominated by lineage mismatched influenza B, northern Spain, 2017/18
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View Affiliations Hide AffiliationsJesús Castillajcastilc navarra.es
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Citation style for this article: . Interim effectiveness of trivalent influenza vaccine in a season dominated by lineage mismatched influenza B, northern Spain, 2017/18. Euro Surveill. 2018;23(7):pii=18-00057. https://doi.org/10.2807/1560-7917.ES.2018.23.7.18-00057 Received: 05 Feb 2018; Accepted: 15 Feb 2018
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Abstract
The 2017/18 interim estimate of trivalent influenza vaccine effectiveness (VE) was 39% (95% confidence interval: 20–54) in Navarre. Compared with individuals unvaccinated in the current and five previous seasons, VE against influenza B was 41% for current and any prior doses, 67% for current vaccination only, and 22% for any prior doses, and 43%, 51% and 54%, respectively against influenza A(H3N2). This suggests moderate VE despite predominance of lineage mismatched influenza B.
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