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Abstract

We compared 2019 influenza seasonality and vaccine effectiveness (VE) in four southern hemisphere countries: Australia, Chile, New Zealand and South Africa. Influenza seasons differed in timing, duration, intensity and predominant circulating viruses. VE estimates were also heterogeneous, with all-ages point estimates ranging from 7–70% (I2: 33%) for A(H1N1)pdm09, 4–57% (I2: 49%) for A(H3N2) and 29–66% (I2: 0%) for B. Caution should be applied when attempting to use southern hemisphere data to predict the northern hemisphere influenza season.

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/content/10.2807/1560-7917.ES.2019.24.45.1900645
2019-11-07
2019-11-13
http://instance.metastore.ingenta.com/content/10.2807/1560-7917.ES.2019.24.45.1900645
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