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Abstract

We conducted a hospital-based test-negative study in Hong Kong to estimate influenza vaccine effectiveness (VE) for the winter of 2017/18. The interim analysis included data on 1,078 children admitted between 4 December 2017 and 31 January 2018 with febrile acute respiratory illness and tested for influenza. We estimated influenza VE at 66% (95% confidence interval (CI): 43–79) overall, and 65% (95% CI: 40–80) against influenza B, the dominant virus type (predominantly B/Yamagata).

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/content/10.2807/1560-7917.ES.2018.23.8.18-00062
2018-02-22
2018-12-10
http://instance.metastore.ingenta.com/content/10.2807/1560-7917.ES.2018.23.8.18-00062
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