Influenza vaccine effectiveness in adults 65 years and older, Denmark, 2015/16 – A rapid epidemiological and virological assessment

  • Hanne Dorthe Emborg*
  • , T. G. Krause
  • , L. Nielsen
  • , M. K. Thomsen
  • , C. B. Christiansen
  • , M. N. Skov
  • , X. C. Nielsen
  • , L. S. Weinreich
  • , T. K. Fischer
  • , J. Rønn
  • , R. Trebbien
  • *Corresponding author af dette arbejde

Publikation: Bidrag til tidsskriftArtikelForskningpeer review

Abstract

In Denmark, both influenza A(H1N1)pdm09 and influenza B co-circulated in the 2015/16 season. We estimated the vaccine effectiveness (VE) of the trivalent influenza vaccine in patients 65 years and older using the test-negative case–control design. The adjusted VE against influenza A(H1N1)pdm09 was 35.0% (95% confidence interval (CI): 11.1–52.4) and against influenza B 4.1% (95% CI: −22.0 to 24.7). The majority of influenza A(H1N1)pdm09 circulating in 2015/16 belonged to the new genetic subgroup subclade 6B.1.

OriginalsprogEngelsk
TidsskriftEurosurveillance
Vol/bind21
Udgave nummer14
DOI
StatusUdgivet - 7 apr. 2016

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