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Abstract

The winter 2018/19 influenza season in Hong Kong has been predominated by influenza A(H1N1)pdm09 as at January 2019. We enrolled 2,016 children in three public hospitals in Hong Kong between 2 September 2018 and 11 January 2019. Using the test-negative approach, we estimated high early season effectiveness of inactivated influenza vaccine against influenza A or B of 90% (95% confidence interval (CI): 80–95%) and 92% (95% CI: 82–96%) against influenza A(H1N1)pdm09.

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/content/10.2807/1560-7917.ES.2019.24.5.1900056
2019-01-31
2019-02-20
http://instance.metastore.ingenta.com/content/10.2807/1560-7917.ES.2019.24.5.1900056
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References

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