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Impact of influenza vaccination programmes among the elderly population on primary care, Portugal, Spain and the Netherlands: 2015/16 to 2017/18 influenza seasons

2019-11-07Journal article Open access
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dc.contributor.authorMachado, Ausenda
dc.contributor.authorMazagatos, Clara
dc.contributor.authorDijkstra, Frederika
dc.contributor.authorKislaya, Irina
dc.contributor.authorGherasim, Alin
dc.contributor.authorMcDonald, Scott A.
dc.contributor.authorKissling, Esther
dc.contributor.authorValenciano, Marta
dc.contributor.authorMeijer, Adam
dc.contributor.authorHooiveld, Mariëtte
dc.contributor.authorNunes, Baltazar
dc.contributor.authorLarrauri, Amparo
dc.date.accessioned2020-04-25T11:58:40Z
dc.date.available2020-04-25T11:58:40Z
dc.date.issued2019-11-07
dc.description.abstractTo increase the acceptability of influenza vaccine, it is important to quantify the overall benefits of the vaccination programme.AimTo assess the impact of influenza vaccination in Portugal, Spain and the Netherlands, we estimated the number of medically attended influenza-confirmed cases (MAICC) in primary care averted in the seasons 2015/16 to 2017/18 among those ≥ 65 years.We used an ecological approach to estimate vaccination impact. We compared the number of observed MAICC (n) to the estimated number that would have occurred without the vaccination programme (N). To estimate N, we used: (i) MAICC estimated from influenza surveillance systems, (ii) vaccine coverage, (iii) pooled (sub)type-specific influenza vaccine effectiveness estimates for seasons 2015/16 to 2017/18, weighted by the proportion of virus circulation in each season and country. We estimated the number of MAICC averted (NAE) and the prevented fraction (PF) by the vaccination programme. The annual average of NAE in the population ≥ 65 years was 33, 58 and 204 MAICC per 100,000 in Portugal, Spain and the Netherlands, respectively. On average, influenza vaccination prevented 10.7%, 10.9% and 14.2% of potential influenza MAICC each season in these countries. The lowest PF was in 2016/17 (4.9-6.1%) with an NAE ranging from 24 to 69 per 100,000. Our results suggest that influenza vaccination programmes reduced a substantial number of MAICC. Together with studies on hospitalisations and deaths averted by influenza vaccination programmes, this will contribute to the evaluation of the impact of vaccination strategies and strengthen public health communication.pt_PT
dc.description.sponsorshipThis work was supported by European Commission Horizon 2020 programme [grant agreement No 634446].pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationEuro Surveill. 2019;24(45):pii=1900268. doi: 10.2807/1560-7917.ES.2019.24.45.1900268pt_PT
dc.identifier.doi10.2807/1560-7917.ES.2019.24.45.1900268pt_PT
dc.identifier.issn1560-7917
dc.identifier.urihttp://hdl.handle.net/10400.18/6522
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherEuropean Centre for Disease Prevention and Controlpt_PT
dc.relationI-MOVE+ Integrated Monitoring of Vaccines Effects in Europe: a platform to measure and compare effectiveness and impact of influenza and pneumococcal vaccines and vaccination strategies in the elderly
dc.relation.publisherversionhttps://www.eurosurveillance.org/content/10.2807/1560-7917.ES.2019.24.45.1900268pt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectInfluenza Vaccinept_PT
dc.subjectVacina Antigripalpt_PT
dc.subjectAverted Casespt_PT
dc.subjectInfluenza Vaccination Impactpt_PT
dc.subjectinfluenzapt_PT
dc.subjectCuidados de Saúdept_PT
dc.subjectDeterminantes da Saúde e da Doençapt_PT
dc.titleImpact of influenza vaccination programmes among the elderly population on primary care, Portugal, Spain and the Netherlands: 2015/16 to 2017/18 influenza seasonspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleI-MOVE+ Integrated Monitoring of Vaccines Effects in Europe: a platform to measure and compare effectiveness and impact of influenza and pneumococcal vaccines and vaccination strategies in the elderly
oaire.awardURIinfo:eu-repo/grantAgreement/EC/H2020/634446/EU
oaire.citation.issue45pt_PT
oaire.citation.startPagepii=1900268pt_PT
oaire.citation.titleEurosurveillancept_PT
oaire.citation.volume24pt_PT
oaire.fundingStreamH2020
project.funder.identifierhttp://doi.org/10.13039/501100008530
project.funder.nameEuropean Commission
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isProjectOfPublicationccfd73a6-6f3c-4702-956c-544973bca97d
relation.isProjectOfPublication.latestForDiscoveryccfd73a6-6f3c-4702-956c-544973bca97d

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