Interim estimates of 2013/14 influenza clinical severity and vaccine effectiveness in the prevention of laboratory-confirmed influenza-related hospitalisation, Canada, February 2014.

Sa McNeil,V Shinde,M Andrew,Tf Hatchette,J Leblanc, A Ambrose,G Boivin, Wr Bowie,F Diaz-Mitoma, M Elsherif,K Green,F Haguinet,S Halperin, B Ibarguchi,K Katz,J Langley,P Lagace-Wiens, B Light,M Loeb,J McElhaney, D Mackinnon-Cameron, Ae McCarthy, M Poirier,J Powis, D Richardson,M Semret, S Smith, D Smyth, G Stiver,S Trottier,L Valiquette, D Webster,L Ye,A McGeer, Collective on behalf of the Public Health Agen, Collective on behalf of the Toronto Invasive B

EUROSURVEILLANCE（2014）

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摘要

During the 2013/14 influenza season in Canada, 631 of 654 hospitalisations for laboratory-confirmed influenza enrolled in sentinel hospitals were due to Influenza A. Of the 375 with known subtype, influenza A(H1N1) accounted for 357. Interim unmatched vaccine effectiveness adjusted for age and presence of one or more medical comorbidities was determined by test-negative case-control design to be 58.5% (90% confidence interval (CI): 43.9-69.3%) overall and 57.9% (90% CI: 37.7-71.5) for confirmed influenza A(H1N1).

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