Effectiveness of the 2010/11 seasonal trivalent influenza vaccine in Spain: preliminary results of a case–control study
Open Access
- 17 March 2011
- journal article
- Published by European Centre for Disease Control and Prevention (ECDC) in Eurosurveillance
- Vol. 16 (11) , 19820
- https://doi.org/10.2807/ese.16.11.19820-en
Abstract
We present preliminary results of a case-control study to estimate influenza vaccine effectiveness in Spain, from week 50 of 2010 to week 6 of 2011. The adjusted effectiveness of the vaccine in preventing laboratory-confirmed influenza due to any type of influenza virus was 50% (95% CI: -6 to 77%) for the trivalent seasonal vaccine and 72% (95% CI: 7 to 92%) for both trivalent seasonal and monovalent pandemic vaccines, suggesting a protective effect of seasonal vaccination lower than that reported for the previous season.Keywords
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