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Influenza season 2012–2013 in Europe: moderate intensity, mixed (sub)types

  • R. SNACKEN (a1), E. BROBERG (a1), J. BEAUTÉ (a1), J. E. LOZANO (a2), P. ZUCS (a1) and A. J. AMATO-GAUCI (a1)...

Summary

This paper summarizes influenza activity in the European Union/European Economic Area (EU/EEA) in 2012–2013. The influenza season 2012–2013 in Europe lasted from early December to late April. Overall the severity of the season could be described as moderate, based on the ILI/ARI consultation rates and the percentage of sentinel specimens positive for influenza compared to previous seasons. Both influenza A and B viruses circulating accounted for 47% and 53% of positive sentinel specimens, respectively, with both A(H1) and A(H3) varying for dominance. Compared to outpatients, the proportion of laboratory-confirmed influenza hospitalized cases infected by A(H1N1)pdm09 was significantly higher in middle-aged patients (33% vs. 17%, χ 2 = 66·6, P < 0·01). Despite a relatively good match between vaccine and circulating strains, vaccine effectiveness was estimated to be moderate.

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Copyright

The online version of this article is published within an Open Access environment subject to the conditions of the Creative Commons Attribution licence http://creativecommons.org/licenses/by/3.0/.

Corresponding author

* Author for correspondence: Dr R. Snacken, European Centre for Disease Prevention and Control (ECDC), Stockholm, Sweden. (Email: rene.snacken@ecdc.europa.eu)

References

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6. Bragstad, K, et al. Low vaccine effectiveness against influenza A(H3N2) virus among elderly people in Denmark in 2012/13 – a rapid epidemiological and virological assessment. Eurosurveillance 2013; 18: pii=20397.
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Epidemiology & Infection
  • ISSN: 0950-2688
  • EISSN: 1469-4409
  • URL: /core/journals/epidemiology-and-infection
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