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In 2014/15 the United Kingdom experienced circulation of influenza A(H3N2) with impact in the elderly. Midseason vaccine effectiveness (VE) shows an adjusted VE of 3.4% (95% CI: −44.8 to 35.5) against primary care consultation with laboratory-confirmed influenza and −2.3% (95% CI: −56.2 to 33.0) for A(H3N2). The low VE reflects mismatch between circulating viruses and the 2014/15 northern hemisphere A(H3N2) vaccine strain. Early use of antivirals for prophylaxis and treatment of vulnerable populations remains important.

Original publication

DOI

10.2807/1560-7917.ES2015.20.5.21025

Type

Journal article

Journal

Eurosurveillance

Publication Date

01/01/2015

Volume

20

Pages

1 - 7