Interim effectiveness of trivalent influenza vaccine in a season dominated by lineage mismatched influenza B, northern Spain, 2017/18.

Interim effectiveness of trivalent influenza vaccine in a season dominated by lineage mismatched influenza B, northern Spain, 2017/18.

Euro Surveill. 2018 Feb;23(7):

Authors: Castilla J, Navascués A, Casado I, Pérez-García A, Aguinaga A, Ezpeleta G, Pozo F, Ezpeleta C, Martínez-Baz I, Primary Health Care Sentinel Network, Network For Influenza Surveillance In Hospitals Of Navarre

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.

PMID: 29471624 [PubMed - in process]

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