Low 2016/17 season vaccine effectiveness against hospitalised influenza A(H3N2) among elderly: awareness warranted for 2017/18 season.

Low 2016/17 season vaccine effectiveness against hospitalised influenza A(H3N2) among elderly: awareness warranted for 2017/18 season. Euro Surveill. 2017 Oct;22(41): Authors: Rondy M, Gherasim A, Casado I, Launay O, Rizzo C, Pitigoi D, Mickiene A, Marbus SD, Machado A, Syrjänen RK, Pem-Novose I, Horváth JK, Larrauri A, Castilla J, Vanhems P, Alfonsi V, Ivanciuc AE, Kuliese M, van Gageldonk-Lafeber R, Gomez V, Ikonen N, Lovric Z, Ferenczi A, I-Move Hospital Working Group, Moren A Abstract In a multicentre European hospital study we measured influenza vaccine effectiveness (IVE) against A(H3N2) in 2016/17. Adjusted IVE was 17% (95% confidence interval (CI): 1 to 31) overall; 25% (95% CI: 2 to 43) among 65-79-year-olds and 13% (95% CI: -15 to 30) among those ≥ 80 years. As the A(H3N2) vaccine component has not changed for 2017/18, physicians and public health experts should be aware that IVE could be low where A(H3N2) viruses predominate. PMID: 29043961 [PubMed - in process]
Source: Euro Surveill - Category: Infectious Diseases Authors: Tags: Euro Surveill Source Type: research