About: Impact of the 2009 H1N1 Pandemic on Age-Specific Epidemic Curves of Other Respiratory Viruses: A Comparison of Pre-Pandemic, Pandemic and Post-Pandemic Periods in a Subtropical City

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About: Impact of the 2009 H1N1 Pandemic on Age-Specific Epidemic Curves of Other Respiratory Viruses: A Comparison of Pre-Pandemic, Pandemic and Post-Pandemic Periods in a Subtropical City Goto Sponge NotDistinct Permalink

An Entity of Type : schema:ScholarlyArticle, within Data Space : wasabi.inria.fr associated with source document(s)

Attributes	Values
type	Academic Article research paper schema:ScholarlyArticle
isDefinedBy	Covid-on-the-Web dataset
has title	Impact of the 2009 H1N1 Pandemic on Age-Specific Epidemic Curves of Other Respiratory Viruses: A Comparison of Pre-Pandemic, Pandemic and Post-Pandemic Periods in a Subtropical City
Creator	Yang, Lin He, Daihai Cao, Peihua Wang, Xiling Peiris, J Chan, King Chan, Kwok, Hung Suen, Lorna Wong, Ming
Source	Medline; PMC
abstract	BACKGROUND: The 2009 H1N1 influenza pandemic caused offseason peaks in temperate regions but coincided with the summer epidemic of seasonal influenza and other common respiratory viruses in subtropical Hong Kong. This study was aimed to investigate the impact of the pandemic on age-specific epidemic curves of other respiratory viruses. METHODS: Weekly laboratory-confirmed cases of influenza A (subtypes seasonal A(H1N1), A(H3N2), pandemic virus A(H1N1)pdm09), influenza B, respiratory syncytial virus (RSV), adenovirus and parainfluenza were obtained from 2004 to 2013. Age-specific epidemic curves of viruses other than A(H1N1)pdm09 were compared between the pre-pandemic (May 2004 – April 2009), pandemic (May 2009 – April 2010) and post-pandemic periods (May 2010 – April 2013). RESULTS: There were two peaks of A(H1N1)pdm09 in Hong Kong, the first in September 2009 and the second in February 2011. The infection rate was found highest in young children in both waves, but markedly fewer cases in school children were recorded in the second wave than in the first wave. Positive proportions of viruses other than A(H1N1)pdm09 markedly decreased in all age groups during the first pandemic wave. After the first wave of the pandemic, the positive proportion of A(H3N2) increased, but those of B and RSV remained slightly lower than their pre-pandemic proportions. Changes in seasonal pattern and epidemic peak time were also observed, but inconsistent across virus-age groups. CONCLUSION: Our findings provide some evidence that age distribution, seasonal pattern and peak time of other respiratory viruses have changed since the pandemic. These changes could be the result of immune interference and changing health seeking behavior, but the mechanism behind still needs further investigations.
has issue date	2015-04-30(xsd:dateTime)
bibo:doi	10.1371/journal.pone.0125447
bibo:pmid	25928217
has license	cc-by
sha1sum (hex)	3025f11897040ad8046b2a7ef8e94fc8615df214
schema:url	https://doi.org/10.1371/journal.pone.0125447
resource representing a document's title	Impact of the 2009 H1N1 Pandemic on Age-Specific Epidemic Curves of Other Respiratory Viruses: A Comparison of Pre-Pandemic, Pandemic and Post-Pandemic Periods in a Subtropical City
has PubMed Central identifier	PMC4416050
has PubMed identifier	25928217
schema:publication	PLoS One
resource representing a document's body	covid:3025f11897040ad8046b2a7ef8e94fc8615df214#body_text
is schema:about of	named entity 'subtropical' named entity 'Respiratory' covid:arg/3025f11897040ad8046b2a7ef8e94fc8615df214 named entity 'RESPIRATORY VIRUSES' named entity 'PANDEMIC' named entity 'SUBTROPICAL' named entity 'SPECIFIC' named entity 'STUDY' named entity 'SUMMER' named entity 'HONG KONG' named entity 'SEASONAL INFLUENZA' named entity 'CITY' named entity 'AGE' named entity 'EPIDEMIC' named entity 'IMPACT' named entity 'COMMON' named entity 'BUT' named entity 'TO INVESTIGATE' named entity 'TEMPERATE REGIONS' named entity 'AGE' named entity 'EPIDEMIC' named entity 'IMPACT' named entity 'SPECIFIC' named entity 'PERIODS' named entity 'RESPIRATORY VIRUSES' named entity 'H1N1' named entity 'PRE' named entity 'CAUSED' named entity 'SUBTROPICAL' named entity 'PANDEMIC' named entity 'H1N1 INFLUENZA' named entity 'PEAKS' named entity 'POST' named entity 'COMPARISON' named entity 'INFLUENZA PANDEMIC' named entity '2009' named entity 'summer' named entity 'study' named entity 'epidemic' named entity 'viruses' named entity 'temperate regions' named entity 'subtropical' named entity 'Subtropical' named entity 'vaccines' named entity 'widely reported' named entity 'epidemic' named entity 'temperate regions' named entity 'immune response' named entity 'Influenza B' named entity 'sentinel surveillance' named entity 'respiratory symptoms' named entity 'innate immunity' named entity 'vaccination' named entity 'young children' named entity 'young children' named entity 'influenza' named entity 'adenovirus' named entity 'viruses' named entity 'influenza season' named entity 'H3N2' named entity 'influenza' named entity 'age distribution' named entity '20%' named entity 'H3N2' named entity 'influenza vaccination' named entity 'virus' named entity 'virus' named entity 'viruses' named entity 'Hong Kong' named entity 'epidemics' named entity 'type 1' named entity 'respiratory diseases'

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