1887
Research articles Open Access
Like 0

Abstract

The 2014/15 influenza season in Canada has been characterised to date by early and intense activity dominated by influenza A(H3N2). A total of 99.0% (593/599) hospitalisations for laboratory-confirmed influenza with a known influenza virus type enrolled in sentinel hospitals of the Serious Outcomes Surveillance Network of the Canadian Immunization Research Network were due to influenza A. Of the 216 with a known subtype, influenza A(H3N2) accounted for 99.1% (n=214). Interim unmatched vaccine effectiveness (VE) estimates adjusted for age and presence of one or more medical comorbidities were determined by test-negative case-control design to be ?16.8% (90% confidence interval (CI): ?48.9 to 8.3) overall and ?22.0% (90% CI: ?66.5 to 10.7) for laboratory-confirmed influenza A(H3N2). Among adults?aged under?65 years, the overall VE was 10.8% (90% CI: ?50.2 to 47.0) while in adults?aged 65 years or older, the overall VE was ?25.4% (90% CI: ?65.0 to 4.6). .

Loading

Article metrics loading...

/content/10.2807/1560-7917.ES2015.20.5.21024
2015-02-05
2017-12-12
http://instance.metastore.ingenta.com/content/10.2807/1560-7917.ES2015.20.5.21024
Loading
Loading full text...

Full text loading...

/deliver/fulltext/eurosurveillance/20/5/art21024-en.htm?itemId=/content/10.2807/1560-7917.ES2015.20.5.21024&mimeType=html&fmt=ahah
Comment has been disabled for this content
Submit comment
Close
Comment moderation successfully completed
This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error