Eurosurv. Heterogeneity in influenza seasonality and vaccine effectiveness in Australia, Chile, New Zealand and South Africa: early estimates of the 2

[tetano]

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% (I[SUP]2[/SUP]: 33%) for A(H1N1)pdm09, 4–57% (I[SUP]2[/SUP]: 49%) for A(H3N2) and 29–66% (I[SUP]2[/SUP]: 0%) for B. Caution should be applied when attempting to use southern hemisphere data to predict the northern hemisphere influenza season.

full article

https://www.eurosurveillance.org/content/10.2807/1560-7917.ES.2019.24.45.1900645#abstract_content