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Heterogeneity in influenza seasonality and vaccine effectiveness in Australia, Chile, New Zealand and South Africa: early estimates of the 2019 influenza season.
- Sullivan, Sheena;
- Arriola, Carmen;
- Bocacao, Judy;
- Burgos, Pamela;
- Bustos, Patricia;
- Carville, Kylie;
- Cheng, Allen;
- Chilver, Monique;
- Cohen, Cheryl;
- Deng, Yi-Mo;
- El Omeiri, Nathalie;
- Fasce, Rodrigo;
- Hellferscee, Orienka;
- Huang, Q;
- Gonzalez, Cecilia;
- Jelley, Lauren;
- Leung, Vivian;
- Lopez, Liza;
- McAnerney, Johanna;
- McNeill, Andrea;
- Olivares, Maria;
- Peck, Heidi;
- Sotomayor, Viviana;
- Tempia, Stefano;
- Vergara, Natalia;
- von Gottberg, Anne;
- Walaza, Sibongile;
- Wood, Timothy
- et al.
Published Web Location
https://doi.org/10.2807/1560-7917.ES.2019.24.45.1900645Abstract
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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