Influenza season in Réunion dominated by influenza B virus circulation associated with numerous cases of severe disease, France, 2014

E Brottet; D Vandroux; B A Gauzere; E Antok; M C Jaffar-Bandjee; A Michault; L Filleul

doi:10.2807/1560-7917.ES2014.19.39.20916

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Influenza season in Réunion dominated by influenza B virus circulation associated with numerous cases of severe disease, France, 2014
E Brottet¹ , D Vandroux² , B A Gauzere² , E Antok³ , M C Jaffar-Bandjee⁴ , A Michault⁵ , L Filleul¹
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Affiliations: ¹ Cire océan Indien (Cire OI), Institut de Veille Sanitaire (InVS), Saint Denis, Réunion, France ² Intensive Care Unit, Centre Hospitalier Universitaire, Saint-Denis, Réunion, France ³ Intensive Care Unit, Centre Hospitalier Universitaire, Saint-Pierre, Réunion, France ⁴ Laboratory of virology, Centre Hospitalier Universitaire, Saint-Denis, Réunion, France ⁵ Laboratory of Biology, Centre Hospitalier Universitaire, Saint-Pierre, Réunion, France

Correspondence:
E Brottet
elise.brottet ars.sante.fr
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Citation style for this article: Brottet E, Vandroux D, Gauzere B A, Antok E, Jaffar-Bandjee M C, Michault A, Filleul L. Influenza season in Réunion dominated by influenza B virus circulation associated with numerous cases of severe disease, France, 2014. Euro Surveill. 2014;19(39):pii=20916. https://doi.org/10.2807/1560-7917.ES2014.19.39.20916 Received: 15 Sept 2014

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Abstract

The 2014 seasonal influenza in Réunion, a French overseas territory in the southern hemisphere, was dominated by influenza B. Resulting morbidity impacted public health. Relative to the total number of all-cause consultations over the whole season, the rate of acute respiratory infection (ARI) consultations was 6.5%. Severe disease occurred in 32 laboratory-confirmed influenza cases (31.7 per 100,000 ARI consultations), 16 with influenza B. The observed disease dynamics could present a potential scenario for the next European influenza season. .