tetano
Editor, Senior Moderator
J Infect. 2017 Sep 18. pii: S0163-4453(17)30299-2. doi: 10.1016/j.jinf.2017.09.010. [Epub ahead of print]
[h=1]Effectiveness of influenza vaccines in preventing severe influenza illness among adults: A systematic review and meta-analysis of test-negative design case-control studies.[/h] Rondy M[SUP]1[/SUP], El Omeiri N[SUP]2[/SUP], Thompson MG[SUP]3[/SUP], Lev?que A[SUP]2[/SUP], Moren A[SUP]4[/SUP], Sullivan S[SUP]5[/SUP].
[h=3]Author information[/h]
[h=3]Abstract[/h] [h=4]OBJECTIVES:[/h] Summary evidence of influenza vaccine effectiveness (IVE) against hospitalized influenza is lacking. We conducted a meta-analysis of studies reporting IVE against laboratory-confirmed hospitalized influenza among adults.
[h=4]METHODS:[/h] We searched Pubmed (January 2009 to November 2016) for studies that used test-negative design (TND) to enrol patients hospitalized with influenza-associated conditions. Two independent authors selected relevant articles. We calculated pooled IVE against any and (sub)type specific influenza among all adults, and stratified by age group (18-64 and 65 years and above) using random-effects models.
[h=4]RESULTS:[/h] We identified 3411 publications and 30 met our inclusion criteria. Between 2010-11 and 2014-15, the pooled seasonal IVE was 41% (95%CI:34;48) for any influenza (51% (95%CI:44;58) among people aged 18-64y and 37% (95%CI:30;44) among ≥65 years). IVE was 48% (95%CI:37;59),37% (95%CI:24;50) and 38% (95%CI:23;53) against influenza A(H1N1)pdm09, A(H3N2) and B, respectively. Among persons aged ≥65 year, IVE against A(H3N2) was 43% (95%CI:33;53) in seasons when circulating and vaccine strains were antigenically similar and 14% (95%CI:-3;30) when A(H3N2) variant viruses predominated.
[h=4]CONCLUSIONS:[/h] Influenza vaccines provided moderate protection against influenza-associated hospitalizations among adults. They seemed to provide low protection among elderly in seasons where vaccine and circulating A(H3N2) strains were antigenically variant.
Copyright ? 2017 The British Infection Association. All rights reserved.
[h=4]KEYWORDS:[/h] Adults; Hospitalization; Influenza; Meta-analysis; Systematic review; Vaccine effectiveness
PMID: 28935236 DOI: 10.1016/j.jinf.2017.09.010
[h=1]Effectiveness of influenza vaccines in preventing severe influenza illness among adults: A systematic review and meta-analysis of test-negative design case-control studies.[/h] Rondy M[SUP]1[/SUP], El Omeiri N[SUP]2[/SUP], Thompson MG[SUP]3[/SUP], Lev?que A[SUP]2[/SUP], Moren A[SUP]4[/SUP], Sullivan S[SUP]5[/SUP].
[h=3]Author information[/h]
[h=3]Abstract[/h] [h=4]OBJECTIVES:[/h] Summary evidence of influenza vaccine effectiveness (IVE) against hospitalized influenza is lacking. We conducted a meta-analysis of studies reporting IVE against laboratory-confirmed hospitalized influenza among adults.
[h=4]METHODS:[/h] We searched Pubmed (January 2009 to November 2016) for studies that used test-negative design (TND) to enrol patients hospitalized with influenza-associated conditions. Two independent authors selected relevant articles. We calculated pooled IVE against any and (sub)type specific influenza among all adults, and stratified by age group (18-64 and 65 years and above) using random-effects models.
[h=4]RESULTS:[/h] We identified 3411 publications and 30 met our inclusion criteria. Between 2010-11 and 2014-15, the pooled seasonal IVE was 41% (95%CI:34;48) for any influenza (51% (95%CI:44;58) among people aged 18-64y and 37% (95%CI:30;44) among ≥65 years). IVE was 48% (95%CI:37;59),37% (95%CI:24;50) and 38% (95%CI:23;53) against influenza A(H1N1)pdm09, A(H3N2) and B, respectively. Among persons aged ≥65 year, IVE against A(H3N2) was 43% (95%CI:33;53) in seasons when circulating and vaccine strains were antigenically similar and 14% (95%CI:-3;30) when A(H3N2) variant viruses predominated.
[h=4]CONCLUSIONS:[/h] Influenza vaccines provided moderate protection against influenza-associated hospitalizations among adults. They seemed to provide low protection among elderly in seasons where vaccine and circulating A(H3N2) strains were antigenically variant.
Copyright ? 2017 The British Infection Association. All rights reserved.
[h=4]KEYWORDS:[/h] Adults; Hospitalization; Influenza; Meta-analysis; Systematic review; Vaccine effectiveness
PMID: 28935236 DOI: 10.1016/j.jinf.2017.09.010