Early estimates of seasonal influenza vaccine effectiveness in Europe among tar...

• Author(s): Kissling, E. ; Valenciano, M. ; I-MOVE, Case-Control Studies Team
• Date: 2012
• Persistent ID: http://hdl.handle.net/10400.18/996
• Origin: Repositório Científico do Instituto Nacional de Saúde
• Subject(s): Influenza; Vaccine; Effectiveness; Determinantes da Saúde e da Doença
• Document Type: Article
• Language: English

Description

Colaboração de: Baltazar Nunes, investigador do DEP To provide an early estimate of 2011/12 influenza vaccine effectiveness (VE), we conducted a multicentre case–control study based on seven sentinel surveillance networks. We included influenza-like illness cases up to week 7/2012 from the vaccination target groups, swabbed less than eight days after symptom onset. Laboratory-confirmed influenza A(H3) cases were compared to negative controls. Adjusted VE was 43% (95% confidence interval: -0.4 to 67.7), suggesting low to moderate VE against influenza A(H3) in the early 2011/12 season.