Attack rates assessment of the 2009 pandemic H1N1 influenza A in children and their contacts: a systematic review and meta-analysis.

<h4>Background</h4>The recent H1N1 influenza A pandemic was marked by multiple reports of illness and hospitalization in children, suggesting that children may have played a major role in the propagation of the virus. A comprehensive detailed analysis of the attack rates among children a...

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Main Authors: Aharona Glatman-Freedman, Ian Portelli, Susan K Jacobs, Justin I Mathew, Jonathan E Slutzman, Lewis R Goldfrank, Silas W Smith
Format: Article
Language:English
Published: Public Library of Science (PLoS) 2012-01-01
Series:PLoS ONE
Online Access:https://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0050228&type=printable
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author Aharona Glatman-Freedman
Ian Portelli
Susan K Jacobs
Justin I Mathew
Jonathan E Slutzman
Lewis R Goldfrank
Silas W Smith
author_facet Aharona Glatman-Freedman
Ian Portelli
Susan K Jacobs
Justin I Mathew
Jonathan E Slutzman
Lewis R Goldfrank
Silas W Smith
author_sort Aharona Glatman-Freedman
collection DOAJ
description <h4>Background</h4>The recent H1N1 influenza A pandemic was marked by multiple reports of illness and hospitalization in children, suggesting that children may have played a major role in the propagation of the virus. A comprehensive detailed analysis of the attack rates among children as compared with their contacts in various settings is of great importance for understanding their unique role in influenza pandemics.<h4>Methodology/principal findings</h4>We searched MEDLINE (PubMed) and Embase for published studies reporting outbreak investigations with direct measurements of attack rates of the 2009 pandemic H1N1 influenza A among children, and quantified how these compare with those of their contacts. We identified 50 articles suitable for review, which reported school, household, travel and social events. The selected reports and our meta-analysis indicated that children had significantly higher attack rates as compared to adults, and that this phenomenon was observed for both virologically confirmed and clinical cases, in various settings and locations around the world. The review also provided insight into some characteristics of transmission between children and their contacts in the various settings.<h4>Conclusion/significance</h4>The consistently higher attack rates of the 2009 pandemic H1N1 influenza A among children, as compared to adults, as well as the magnitude of the difference is important for understanding the contribution of children to disease burden, for implementation of mitigation strategies directed towards children, as well as more precise mathematical modeling and simulation of future influenza pandemics.
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spelling doaj-art-21270e5777644f27bbbda3777e04d2a22025-08-20T02:35:00ZengPublic Library of Science (PLoS)PLoS ONE1932-62032012-01-01711e5022810.1371/journal.pone.0050228Attack rates assessment of the 2009 pandemic H1N1 influenza A in children and their contacts: a systematic review and meta-analysis.Aharona Glatman-FreedmanIan PortelliSusan K JacobsJustin I MathewJonathan E SlutzmanLewis R GoldfrankSilas W Smith<h4>Background</h4>The recent H1N1 influenza A pandemic was marked by multiple reports of illness and hospitalization in children, suggesting that children may have played a major role in the propagation of the virus. A comprehensive detailed analysis of the attack rates among children as compared with their contacts in various settings is of great importance for understanding their unique role in influenza pandemics.<h4>Methodology/principal findings</h4>We searched MEDLINE (PubMed) and Embase for published studies reporting outbreak investigations with direct measurements of attack rates of the 2009 pandemic H1N1 influenza A among children, and quantified how these compare with those of their contacts. We identified 50 articles suitable for review, which reported school, household, travel and social events. The selected reports and our meta-analysis indicated that children had significantly higher attack rates as compared to adults, and that this phenomenon was observed for both virologically confirmed and clinical cases, in various settings and locations around the world. The review also provided insight into some characteristics of transmission between children and their contacts in the various settings.<h4>Conclusion/significance</h4>The consistently higher attack rates of the 2009 pandemic H1N1 influenza A among children, as compared to adults, as well as the magnitude of the difference is important for understanding the contribution of children to disease burden, for implementation of mitigation strategies directed towards children, as well as more precise mathematical modeling and simulation of future influenza pandemics.https://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0050228&type=printable
spellingShingle Aharona Glatman-Freedman
Ian Portelli
Susan K Jacobs
Justin I Mathew
Jonathan E Slutzman
Lewis R Goldfrank
Silas W Smith
Attack rates assessment of the 2009 pandemic H1N1 influenza A in children and their contacts: a systematic review and meta-analysis.
PLoS ONE
title Attack rates assessment of the 2009 pandemic H1N1 influenza A in children and their contacts: a systematic review and meta-analysis.
title_full Attack rates assessment of the 2009 pandemic H1N1 influenza A in children and their contacts: a systematic review and meta-analysis.
title_fullStr Attack rates assessment of the 2009 pandemic H1N1 influenza A in children and their contacts: a systematic review and meta-analysis.
title_full_unstemmed Attack rates assessment of the 2009 pandemic H1N1 influenza A in children and their contacts: a systematic review and meta-analysis.
title_short Attack rates assessment of the 2009 pandemic H1N1 influenza A in children and their contacts: a systematic review and meta-analysis.
title_sort attack rates assessment of the 2009 pandemic h1n1 influenza a in children and their contacts a systematic review and meta analysis
url https://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0050228&type=printable
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