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

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URI: http://hdl.handle.net/20.500.12105/8994
ISSN: 1560-7917
DOI: 10.2807/1560-7917.ES.2017.22.41.17-00645

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2017

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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.

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A(H3N2) Influenza Cases control Elderly Hospitalisation Vaccine effectiveness

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Adolescent Adult Aged European Union Female Hospitalization Hospitals Humans Influenza A Virus, H3N2 Subtype Influenza Vaccines Influenza, Human Male Middle Aged Outcome Assessment, Health Care Seasons

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Bibliographic citation

Euro Surveill. 2017 Oct;22(41).

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Centro Nacional de Epidemiología (CNE)
IdiSNA - Instituto de Investigación Sanitaria de Navarra (Navarra)

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https://doi.org/10.2807/1560-7917.ES.2017.22.41.17-00645

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research article