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Abstract

We present estimates of influenza vaccine effectiveness (VE) in Navarre, Spain, in the early 2012/13 season, which was dominated by influenza B. In a population-based cohort using electronic records from physicians, the adjusted VE in preventing influenza-like illness was 32% (95% confidence interval (CI): 15 to 46). In a nested test-negative case-control analysis the adjusted VE in preventing laboratory-confirmed influenza was 86% (95% CI: 45 to 96). These results suggest a high protective effect of the vaccine. .

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/content/10.2807/ese.18.07.20404-en
2013-02-14
2017-12-13
http://instance.metastore.ingenta.com/content/10.2807/ese.18.07.20404-en
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