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Prevailing effectiveness of the 2009 influenza A(H1N1)pdm09 vaccine during the 2010/11 season in Sweden
Department of Communicable Disease Control and Prevention Jämtland County, Östersund, Sweden.
Vise andre og tillknytning
2013 (engelsk)Inngår i: Eurosurveillance, ISSN 1025-496X, E-ISSN 1560-7917, Vol. 18, nr 15, s. Article 5-Artikkel i tidsskrift (Fagfellevurdert) Epub ahead of print
Abstract [en]

Sixty per cent of the Swedish population received the monovalent AS03-adjuvanted pandemic influenza vaccine in the autumn of 2009. We assessed the age-specific effectiveness of this pandemic vaccine against hospitalisation with laboratory-confirmed influenza A(H1N1)pdm09 during the season 2010/11, in the age group from six months to 64 years in Sweden. The screening method was applied to available surveillance data. Our results suggest a prevailing effectiveness of 72% (95% confidence interval (CI): 63–80%) with the highest effectiveness among children, six months to nine years-old (92%, 95%CI: 80–97%). However, there were limitations in data quality and study design due to the lack of systematic recording of administered vaccinations, which underline the importance of preparing for an evaluation when planning for large public health actions. Despite these limitations, we believe the results reflect true, high prevailing vaccine effectiveness. Indeed, there were fewer deaths caused by influenza and the impact of influenza on intensive care units was less severe during the 2010/11 season in Sweden than in countries with lower pandemic vaccination coverage. The association between the pandemic vaccine and narcolepsy has increased the importance of assessing the risks and benefits of the vaccination; studies on the effectiveness and the duration of protection are needed for this.

sted, utgiver, år, opplag, sider
eurosurveillance , 2013. Vol. 18, nr 15, s. Article 5-
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URN: urn:nbn:se:umu:diva-71143PubMedID: 23594578OAI: oai:DiVA.org:umu-71143DiVA, id: diva2:622136
Tilgjengelig fra: 2013-05-20 Laget: 2013-05-20 Sist oppdatert: 2018-06-08bibliografisk kontrollert

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