{"id":"https://openalex.org/W2002395725","doi":"https://doi.org/10.1371/journal.pone.0026427","title":"Seroprevalence of Pandemic Influenza H1N1 in Ontario from January 2009\u2013May 2010","display_name":"Seroprevalence of Pandemic Influenza H1N1 in Ontario from January 2009\u2013May 2010","publication_year":2011,"publication_date":"2011-11-14","ids":{"openalex":"https://openalex.org/W2002395725","doi":"https://doi.org/10.1371/journal.pone.0026427","mag":"2002395725","pmid":"https://pubmed.ncbi.nlm.nih.gov/22110586","pmcid":"https://www.ncbi.nlm.nih.gov/pmc/articles/3215698"},"language":"en","primary_location":{"id":"doi:10.1371/journal.pone.0026427","doi":"https://doi.org/10.1371/journal.pone.0026427","is_oa":true,"landing_page_url":"https://doi.org/10.1371/journal.pone.0026427","pdf_url":"https://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0026427&type=printable","source":{"id":"https://openalex.org/S202381698","display_name":"PLoS ONE","issn_l":"1932-6203","issn":["1932-6203"],"is_oa":true,"is_in_doaj":true,"is_core":true,"listed_in":["anvur-class-a","anvur-scientific","cwts-core","doaj","dongbi-c","doyens","erih-plus","jufo-1","ki-jl-1","medline","norway-1","poland-100","russia-white-list-1","vabb-shw"],"host_organization":"https://openalex.org/P4310315706","host_organization_name":"Public Library of Science","host_organization_lineage":["https://openalex.org/P4310315706"],"host_organization_lineage_names":["Public Library of Science"],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"PLoS ONE","raw_type":"journal-article"},"volume":null,"type":"article","is_traditional":true,"indexed_in":["crossref","doaj","pubmed"],"open_access":{"is_oa":true,"oa_status":"gold","oa_url":"https://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0026427&type=printable","any_repository_has_fulltext":true},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5050753060","display_name":"Camille Achonu","orcid":"https://orcid.org/0000-0001-7645-8251","observed_orcids":["https://orcid.org/0000-0001-7645-8251"]},"institutions":[{"id":"https://openalex.org/I4210125326","display_name":"Public Health Ontario","ror":"https://ror.org/025z8ah66","country_code":"CA","type":"healthcare","lineage":["https://openalex.org/I4210125326"]}],"countries":["CA"],"is_corresponding":false,"raw_author_name":"Camille Achonu","raw_affiliation_strings":["Department of Surveillance and Epidemiology, Public Health Ontario, Toronto, Ontario, Canada"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Surveillance and Epidemiology, Public Health Ontario, Toronto, Ontario, Canada","institution_ids":["https://openalex.org/I4210125326"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5050289436","display_name":"Laura C. Rosella","orcid":"https://orcid.org/0000-0003-4867-869X","observed_orcids":["https://orcid.org/0000-0003-4867-869X"]},"institutions":[{"id":"https://openalex.org/I185261750","display_name":"University of Toronto","ror":"https://ror.org/03dbr7087","country_code":"CA","type":"education","lineage":["https://openalex.org/I185261750"]},{"id":"https://openalex.org/I4210125326","display_name":"Public Health Ontario","ror":"https://ror.org/025z8ah66","country_code":"CA","type":"healthcare","lineage":["https://openalex.org/I4210125326"]}],"countries":["CA"],"is_corresponding":false,"raw_author_name":"Laura Rosella","raw_affiliation_strings":["Dalla Lana School of Public Health, University of Toronto, Toronto, Ontario, Canada","Department of Surveillance and Epidemiology, Public Health Ontario, Toronto, Ontario, Canada"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Dalla Lana School of Public Health, University of Toronto, Toronto, Ontario, Canada","institution_ids":["https://openalex.org/I185261750"]},{"raw_affiliation_string":"Department of Surveillance and Epidemiology, Public Health Ontario, Toronto, Ontario, Canada","institution_ids":["https://openalex.org/I4210125326"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5007833843","display_name":"Jonathan B. Gubbay","orcid":"https://orcid.org/0000-0003-0026-3786","observed_orcids":["https://orcid.org/0000-0003-0026-3786"]},"institutions":[{"id":"https://openalex.org/I185261750","display_name":"University of Toronto","ror":"https://ror.org/03dbr7087","country_code":"CA","type":"education","lineage":["https://openalex.org/I185261750"]},{"id":"https://openalex.org/I4210125326","display_name":"Public Health Ontario","ror":"https://ror.org/025z8ah66","country_code":"CA","type":"healthcare","lineage":["https://openalex.org/I4210125326"]}],"countries":["CA"],"is_corresponding":false,"raw_author_name":"Jonathan B. Gubbay","raw_affiliation_strings":["Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario, Canada","Public Health Laboratories, Public Health Ontario, Toronto, Ontario, Canada"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario, Canada","institution_ids":["https://openalex.org/I185261750"]},{"raw_affiliation_string":"Public Health Laboratories, Public Health Ontario, Toronto, Ontario, Canada","institution_ids":["https://openalex.org/I4210125326"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5069034327","display_name":"Shelley L. Deeks","orcid":"https://orcid.org/0000-0002-4055-1398","observed_orcids":["https://orcid.org/0000-0002-4055-1398"]},"institutions":[{"id":"https://openalex.org/I185261750","display_name":"University of Toronto","ror":"https://ror.org/03dbr7087","country_code":"CA","type":"education","lineage":["https://openalex.org/I185261750"]},{"id":"https://openalex.org/I4210125326","display_name":"Public Health Ontario","ror":"https://ror.org/025z8ah66","country_code":"CA","type":"healthcare","lineage":["https://openalex.org/I4210125326"]}],"countries":["CA"],"is_corresponding":false,"raw_author_name":"Shelley Deeks","raw_affiliation_strings":["Dalla Lana School of Public Health, University of Toronto, Toronto, Ontario, Canada","Department of Surveillance and Epidemiology, Public Health Ontario, Toronto, Ontario, Canada"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Dalla Lana School of Public Health, University of Toronto, Toronto, Ontario, Canada","institution_ids":["https://openalex.org/I185261750"]},{"raw_affiliation_string":"Department of Surveillance and Epidemiology, Public Health Ontario, Toronto, Ontario, Canada","institution_ids":["https://openalex.org/I4210125326"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5014174809","display_name":"Anu Rebbapragada","orcid":"https://orcid.org/0009-0007-2883-6407","observed_orcids":["https://orcid.org/0009-0007-2883-6407"]},"institutions":[{"id":"https://openalex.org/I4210125326","display_name":"Public Health Ontario","ror":"https://ror.org/025z8ah66","country_code":"CA","type":"healthcare","lineage":["https://openalex.org/I4210125326"]}],"countries":["CA"],"is_corresponding":false,"raw_author_name":"Anu Rebbapragada","raw_affiliation_strings":["Public Health Laboratories, Public Health Ontario, Toronto, Ontario, Canada"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Public Health Laboratories, Public Health Ontario, Toronto, Ontario, Canada","institution_ids":["https://openalex.org/I4210125326"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5008497571","display_name":"Tony Mazzulli","orcid":"https://orcid.org/0000-0002-2682-8792","observed_orcids":["https://orcid.org/0000-0002-2682-8792"]},"institutions":[{"id":"https://openalex.org/I4210125326","display_name":"Public Health Ontario","ror":"https://ror.org/025z8ah66","country_code":"CA","type":"healthcare","lineage":["https://openalex.org/I4210125326"]}],"countries":["CA"],"is_corresponding":false,"raw_author_name":"Tony Mazzulli","raw_affiliation_strings":["Public Health Laboratories, Public Health Ontario, Toronto, Ontario, Canada"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Public Health Laboratories, Public Health Ontario, Toronto, Ontario, Canada","institution_ids":["https://openalex.org/I4210125326"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5054763765","display_name":"Don Willison","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I4210125326","display_name":"Public Health Ontario","ror":"https://ror.org/025z8ah66","country_code":"CA","type":"healthcare","lineage":["https://openalex.org/I4210125326"]}],"countries":["CA"],"is_corresponding":false,"raw_author_name":"Don Willison","raw_affiliation_strings":["Department of Surveillance and Epidemiology, Public Health Ontario, Toronto, Ontario, Canada"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Surveillance and Epidemiology, Public Health Ontario, Toronto, Ontario, Canada","institution_ids":["https://openalex.org/I4210125326"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5113593918","display_name":"Julie Foisy","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I4210125326","display_name":"Public Health Ontario","ror":"https://ror.org/025z8ah66","country_code":"CA","type":"healthcare","lineage":["https://openalex.org/I4210125326"]}],"countries":["CA"],"is_corresponding":false,"raw_author_name":"Julie Foisy","raw_affiliation_strings":["Department of Surveillance and Epidemiology, Public Health Ontario, Toronto, Ontario, Canada"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Surveillance and Epidemiology, Public Health Ontario, Toronto, Ontario, Canada","institution_ids":["https://openalex.org/I4210125326"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5008543119","display_name":"Allison McGeer","orcid":"https://orcid.org/0000-0001-5647-6137","observed_orcids":["https://orcid.org/0000-0001-5647-6137"]},"institutions":[{"id":"https://openalex.org/I1291836623","display_name":"Mount Sinai Hospital","ror":"https://ror.org/05deks119","country_code":"CA","type":"healthcare","lineage":["https://openalex.org/I1291836623","https://openalex.org/I4210130843"]},{"id":"https://openalex.org/I185261750","display_name":"University of Toronto","ror":"https://ror.org/03dbr7087","country_code":"CA","type":"education","lineage":["https://openalex.org/I185261750"]}],"countries":["CA"],"is_corresponding":false,"raw_author_name":"Allison McGeer","raw_affiliation_strings":["Dalla Lana School of Public Health, University of Toronto, Toronto, Ontario, Canada","Department of Microbiology, Mount Sinai Hospital, Toronto, Ontario, Canada"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Dalla Lana School of Public Health, University of Toronto, Toronto, Ontario, Canada","institution_ids":["https://openalex.org/I185261750"]},{"raw_affiliation_string":"Department of Microbiology, Mount Sinai Hospital, Toronto, Ontario, Canada","institution_ids":["https://openalex.org/I1291836623"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5007252923","display_name":"Ian L Johnson","orcid":"https://orcid.org/0000-0002-4005-0518","observed_orcids":["https://orcid.org/0000-0002-4005-0518"]},"institutions":[{"id":"https://openalex.org/I185261750","display_name":"University of Toronto","ror":"https://ror.org/03dbr7087","country_code":"CA","type":"education","lineage":["https://openalex.org/I185261750"]},{"id":"https://openalex.org/I4210125326","display_name":"Public Health Ontario","ror":"https://ror.org/025z8ah66","country_code":"CA","type":"healthcare","lineage":["https://openalex.org/I4210125326"]}],"countries":["CA"],"is_corresponding":false,"raw_author_name":"Ian Johnson","raw_affiliation_strings":["Dalla Lana School of Public Health, University of Toronto, Toronto, Ontario, Canada","Department of Surveillance and Epidemiology, Public Health Ontario, Toronto, Ontario, Canada"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Dalla Lana School of Public Health, University of Toronto, Toronto, Ontario, Canada","institution_ids":["https://openalex.org/I185261750"]},{"raw_affiliation_string":"Department of Surveillance and Epidemiology, Public Health Ontario, Toronto, Ontario, Canada","institution_ids":["https://openalex.org/I4210125326"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5064213440","display_name":"Marie LaFreniere","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I4210125326","display_name":"Public Health Ontario","ror":"https://ror.org/025z8ah66","country_code":"CA","type":"healthcare","lineage":["https://openalex.org/I4210125326"]}],"countries":["CA"],"is_corresponding":false,"raw_author_name":"Marie LaFreniere","raw_affiliation_strings":["Department of Surveillance and Epidemiology, Public Health Ontario, Toronto, Ontario, Canada"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Surveillance and Epidemiology, Public Health Ontario, Toronto, Ontario, Canada","institution_ids":["https://openalex.org/I4210125326"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5109199776","display_name":"Caitlin Johnson","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I4210125326","display_name":"Public Health Ontario","ror":"https://ror.org/025z8ah66","country_code":"CA","type":"healthcare","lineage":["https://openalex.org/I4210125326"]}],"countries":["CA"],"is_corresponding":false,"raw_author_name":"Caitlin Johnson","raw_affiliation_strings":["Department of Surveillance and Epidemiology, Public Health Ontario, Toronto, Ontario, Canada"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Surveillance and Epidemiology, Public Health Ontario, Toronto, Ontario, Canada","institution_ids":["https://openalex.org/I4210125326"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5023893404","display_name":"Jacqueline Willmore","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I4210143003","display_name":"Ottawa Public Health","ror":"https://ror.org/03q29n119","country_code":"CA","type":"healthcare","lineage":["https://openalex.org/I4210143003"]}],"countries":["CA"],"is_corresponding":false,"raw_author_name":"Jacqueline Willmore","raw_affiliation_strings":["Ottawa Public Health, Nepean, Ontario, Canada"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Ottawa Public Health, Nepean, Ontario, Canada","institution_ids":["https://openalex.org/I4210143003"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5070618582","display_name":"Carmen Yue","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I184430034","display_name":"Toronto Public Health","ror":"https://ror.org/010g03x11","country_code":"CA","type":"government","lineage":["https://openalex.org/I184430034"]}],"countries":["CA"],"is_corresponding":false,"raw_author_name":"Carmen Yue","raw_affiliation_strings":["Toronto Public Health, Toronto, Ontario, Canada"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Toronto Public Health, Toronto, Ontario, Canada","institution_ids":["https://openalex.org/I184430034"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5073669305","display_name":"Natasha Sarah Crowcroft","orcid":"https://orcid.org/0000-0002-6761-8783","observed_orcids":["https://orcid.org/0000-0002-6761-8783"]},"institutions":[{"id":"https://openalex.org/I185261750","display_name":"University of Toronto","ror":"https://ror.org/03dbr7087","country_code":"CA","type":"education","lineage":["https://openalex.org/I185261750"]},{"id":"https://openalex.org/I4210125326","display_name":"Public Health Ontario","ror":"https://ror.org/025z8ah66","country_code":"CA","type":"healthcare","lineage":["https://openalex.org/I4210125326"]}],"countries":["CA"],"is_corresponding":true,"raw_author_name":"Natasha S. Crowcroft","raw_affiliation_strings":["Dalla Lana School of Public Health, University of Toronto, Toronto, Ontario, Canada","Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario, Canada","Department of Surveillance and Epidemiology, Public Health Ontario, Toronto, Ontario, Canada"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Dalla Lana School of Public Health, University of Toronto, Toronto, Ontario, Canada","institution_ids":["https://openalex.org/I185261750"]},{"raw_affiliation_string":"Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario, Canada","institution_ids":["https://openalex.org/I185261750"]},{"raw_affiliation_string":"Department of Surveillance and Epidemiology, Public Health Ontario, Toronto, Ontario, Canada","institution_ids":["https://openalex.org/I4210125326"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":5,"corresponding_author_ids":["https://openalex.org/A5073669305"],"corresponding_institution_ids":["https://openalex.org/I185261750","https://openalex.org/I4210125326"],"apc_list":{"value":2382,"currency":"USD","value_usd":2382},"apc_paid":{"value":2382,"currency":"USD","value_usd":2382},"fwci":3.4777,"has_fulltext":true,"cited_by_count":29,"citation_normalized_percentile":{"value":0.9194245,"is_in_top_1_percent":false,"is_in_top_10_percent":true},"cited_by_percentile_year":{"min":88,"max":99},"biblio":{"volume":"6","issue":"11","first_page":"e26427","last_page":"e26427"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10167","display_name":"Influenza Virus Research Studies","score":1.0,"subfield":{"id":"https://openalex.org/subfields/2713","display_name":"Epidemiology"},"field":{"id":"https://openalex.org/fields/27","display_name":"Medicine"},"domain":{"id":"https://openalex.org/domains/4","display_name":"Health Sciences"}},"topics":[{"id":"https://openalex.org/T10167","display_name":"Influenza Virus Research Studies","score":1.0,"subfield":{"id":"https://openalex.org/subfields/2713","display_name":"Epidemiology"},"field":{"id":"https://openalex.org/fields/27","display_name":"Medicine"},"domain":{"id":"https://openalex.org/domains/4","display_name":"Health Sciences"}},{"id":"https://openalex.org/T11243","display_name":"Respiratory viral infections research","score":0.0,"subfield":{"id":"https://openalex.org/subfields/2713","display_name":"Epidemiology"},"field":{"id":"https://openalex.org/fields/27","display_name":"Medicine"},"domain":{"id":"https://openalex.org/domains/4","display_name":"Health Sciences"}},{"id":"https://openalex.org/T11135","display_name":"Virology and Viral Diseases","score":0.0,"subfield":{"id":"https://openalex.org/subfields/2713","display_name":"Epidemiology"},"field":{"id":"https://openalex.org/fields/27","display_name":"Medicine"},"domain":{"id":"https://openalex.org/domains/4","display_name":"Health Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/2009-h1n1-pandemic","display_name":"2009 H1N1 pandemic","score":0.9150000214576721},{"id":"https://openalex.org/keywords/seroprevalence","display_name":"seroprevalence","score":0.9869999885559082},{"id":"https://openalex.org/keywords/hemagglutination-inhibition","display_name":"hemagglutination inhibition","score":0.7730000019073486},{"id":"https://openalex.org/keywords/microneutralization-assay","display_name":"microneutralization","score":0.9629999995231628},{"id":"https://openalex.org/keywords/antibody-titers","display_name":"antibody titers","score":0.5879999995231628},{"id":"https://openalex.org/keywords/risk-factors-for-infection","display_name":"infection risk factors","score":0.8349999785423279},{"id":"https://openalex.org/keywords/age-differences-in-infection","display_name":"age differences in infection","score":0.5370000004768372}],"concepts":[{"id":"https://openalex.org/C2778494684","wikidata":"https://www.wikidata.org/wiki/Q3511357","display_name":"Seroprevalence","level":4,"score":0.933250904083252},{"id":"https://openalex.org/C71924100","wikidata":"https://www.wikidata.org/wiki/Q11190","display_name":"Medicine","level":0,"score":0.7252120971679688},{"id":"https://openalex.org/C89623803","wikidata":"https://www.wikidata.org/wiki/Q12184","display_name":"Pandemic","level":5,"score":0.5949764847755432},{"id":"https://openalex.org/C107130276","wikidata":"https://www.wikidata.org/wiki/Q133805","display_name":"Epidemiology","level":2,"score":0.5904217958450317},{"id":"https://openalex.org/C2908647359","wikidata":"https://www.wikidata.org/wiki/Q2625603","display_name":"Population","level":2,"score":0.5815233588218689},{"id":"https://openalex.org/C72563966","wikidata":"https://www.wikidata.org/wiki/Q1303415","display_name":"Cohort","level":2,"score":0.5648714900016785},{"id":"https://openalex.org/C151956035","wikidata":"https://www.wikidata.org/wiki/Q1132755","display_name":"Logistic regression","level":2,"score":0.5282123684883118},{"id":"https://openalex.org/C22070199","wikidata":"https://www.wikidata.org/wiki/Q192995","display_name":"Vaccination","level":2,"score":0.48626649379730225},{"id":"https://openalex.org/C201903717","wikidata":"https://www.wikidata.org/wiki/Q1778788","display_name":"Cohort study","level":2,"score":0.4752602279186249},{"id":"https://openalex.org/C2777546802","wikidata":"https://www.wikidata.org/wiki/Q834390","display_name":"Influenza A virus","level":3,"score":0.4499281346797943},{"id":"https://openalex.org/C149923435","wikidata":"https://www.wikidata.org/wiki/Q37732","display_name":"Demography","level":1,"score":0.4445042610168457},{"id":"https://openalex.org/C116675565","wikidata":"https://www.wikidata.org/wiki/Q3241045","display_name":"Outbreak","level":2,"score":0.43376433849334717},{"id":"https://openalex.org/C159047783","wikidata":"https://www.wikidata.org/wiki/Q7215","display_name":"Virology","level":1,"score":0.35346394777297974},{"id":"https://openalex.org/C203014093","wikidata":"https://www.wikidata.org/wiki/Q101929","display_name":"Immunology","level":1,"score":0.3101479113101959},{"id":"https://openalex.org/C126322002","wikidata":"https://www.wikidata.org/wiki/Q11180","display_name":"Internal medicine","level":1,"score":0.3031418025493622},{"id":"https://openalex.org/C45189115","wikidata":"https://www.wikidata.org/wiki/Q502159","display_name":"Serology","level":3,"score":0.2720602750778198},{"id":"https://openalex.org/C99454951","wikidata":"https://www.wikidata.org/wiki/Q932068","display_name":"Environmental health","level":1,"score":0.24597081542015076},{"id":"https://openalex.org/C2522874641","wikidata":"https://www.wikidata.org/wiki/Q808","display_name":"Virus","level":2,"score":0.2231934666633606},{"id":"https://openalex.org/C159654299","wikidata":"https://www.wikidata.org/wiki/Q79460","display_name":"Antibody","level":2,"score":0.1887475550174713},{"id":"https://openalex.org/C3008058167","wikidata":"https://www.wikidata.org/wiki/Q84263196","display_name":"Coronavirus disease 2019 (COVID-19)","level":4,"score":0.1426192820072174},{"id":"https://openalex.org/C2779134260","wikidata":"https://www.wikidata.org/wiki/Q12136","display_name":"Disease","level":2,"score":0.07454121112823486},{"id":"https://openalex.org/C524204448","wikidata":"https://www.wikidata.org/wiki/Q788926","display_name":"Infectious disease (medical specialty)","level":3,"score":0.054188698530197144},{"id":"https://openalex.org/C144024400","wikidata":"https://www.wikidata.org/wiki/Q21201","display_name":"Sociology","level":0,"score":0.0}],"mesh":[{"descriptor_ui":"D000293","descriptor_name":"Adolescent","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D000328","descriptor_name":"Adult","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D000368","descriptor_name":"Aged","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D000369","descriptor_name":"Aged, 80 and over","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D005260","descriptor_name":"Female","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D006801","descriptor_name":"Humans","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D007251","descriptor_name":"Influenza, Human","qualifier_ui":"Q000453","qualifier_name":"epidemiology","is_major_topic":true},{"descriptor_ui":"D008297","descriptor_name":"Male","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D008875","descriptor_name":"Middle Aged","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D009864","descriptor_name":"Ontario","qualifier_ui":"Q000453","qualifier_name":"epidemiology","is_major_topic":false},{"descriptor_ui":"D012307","descriptor_name":"Risk Factors","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D012621","descriptor_name":"Seasons","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D015331","descriptor_name":"Cohort Studies","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D016036","descriptor_name":"Seroepidemiologic Studies","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D017677","descriptor_name":"Age Distribution","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D053118","descriptor_name":"Influenza A Virus, H1N1 Subtype","qualifier_ui":"Q000472","qualifier_name":"pathogenicity","is_major_topic":true},{"descriptor_ui":"D055815","descriptor_name":"Young Adult","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D058873","descriptor_name":"Pandemics","qualifier_ui":"Q000706","qualifier_name":"statistics & numerical data","is_major_topic":true}],"locations_count":8,"locations":[{"id":"doi:10.1371/journal.pone.0026427","doi":"https://doi.org/10.1371/journal.pone.0026427","is_oa":true,"landing_page_url":"https://doi.org/10.1371/journal.pone.0026427","pdf_url":"https://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0026427&type=printable","source":{"id":"https://openalex.org/S202381698","display_name":"PLoS ONE","issn_l":"1932-6203","issn":["1932-6203"],"is_oa":true,"is_in_doaj":true,"is_core":true,"listed_in":["anvur-class-a","anvur-scientific","cwts-core","doaj","dongbi-c","doyens","erih-plus","jufo-1","ki-jl-1","medline","norway-1","poland-100","russia-white-list-1","vabb-shw"],"host_organization":"https://openalex.org/P4310315706","host_organization_name":"Public Library of Science","host_organization_lineage":["https://openalex.org/P4310315706"],"host_organization_lineage_names":["Public Library of Science"],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"PLoS ONE","raw_type":"journal-article"},{"id":"pmh:oai:europepmc.org:2221059","doi":null,"is_oa":true,"landing_page_url":"https://www.ncbi.nlm.nih.gov/pmc/articles/3215698","pdf_url":null,"source":{"id":"https://openalex.org/S4306400806","display_name":"Europe PMC (PubMed Central)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I1303153112","host_organization_name":"European Bioinformatics Institute","host_organization_lineage":["https://openalex.org/I1303153112"],"host_organization_lineage_names":[],"type":"repository"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":null,"raw_type":"Text"},{"id":"pmh:oai:pubmedcentral.nih.gov:3215698","doi":null,"is_oa":true,"landing_page_url":"https://www.ncbi.nlm.nih.gov/pmc/articles/3215698","pdf_url":null,"source":{"id":"https://openalex.org/S2764455111","display_name":"PubMed Central","issn_l":null,"issn":null,"is_oa":true,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I1299303238","host_organization_name":"National Institutes of Health","host_organization_lineage":["https://openalex.org/I1299303238"],"host_organization_lineage_names":[],"type":"repository"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"PLoS One","raw_type":"Text"},{"id":"pmid:22110586","doi":null,"is_oa":false,"landing_page_url":"https://pubmed.ncbi.nlm.nih.gov/22110586","pdf_url":null,"source":{"id":"https://openalex.org/S4306525036","display_name":"PubMed","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I1299303238","host_organization_name":"National Institutes of Health","host_organization_lineage":["https://openalex.org/I1299303238"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"PloS one","raw_type":"Journal Article"},{"id":"pmh:oai:CiteSeerX.psu:10.1.1.789.5556","doi":null,"is_oa":false,"landing_page_url":"http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.789.5556","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"ftp://ftp.ncbi.nlm.nih.gov/pub/pmc/30/a2/pone.0026427.PMC3215698.pdf","raw_type":"text"},{"id":"pmh:oai:RePEc:plo:pone00:0026427","doi":null,"is_oa":false,"landing_page_url":"https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0026427","pdf_url":null,"source":{"id":"https://openalex.org/S4306401271","display_name":"RePEc: Research Papers in Economics","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I77793887","host_organization_name":"Federal Reserve Bank of St. Louis","host_organization_lineage":["https://openalex.org/I77793887"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"article"},{"id":"pmh:oai:doaj.org/article:39e93c319a324ec082b4be6b273420a7","doi":null,"is_oa":true,"landing_page_url":"https://doaj.org/article/39e93c319a324ec082b4be6b273420a7","pdf_url":null,"source":{"id":"https://openalex.org/S4306401280","display_name":"DOAJ (DOAJ: Directory of Open Access Journals)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":null,"host_organization_name":null,"host_organization_lineage":[],"host_organization_lineage_names":[],"type":"repository"},"license":"cc-by-sa","license_id":"https://openalex.org/licenses/cc-by-sa","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"PLoS ONE, Vol 6, Iss 11, p e26427 (2011)","raw_type":"article"},{"id":"pmh:oai:figshare.com:article/131489","doi":null,"is_oa":true,"landing_page_url":"https://figshare.com/articles/dataset/Seroprevalence_of_Pandemic_Influenza_H1N1_in_Ontario_from_January_2009_May_2010/131489","pdf_url":null,"source":{"id":"https://openalex.org/S4377196282","display_name":"Figshare","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I4210132348","host_organization_name":"Figshare (United Kingdom)","host_organization_lineage":["https://openalex.org/I4210132348"],"host_organization_lineage_names":[],"type":"repository"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"","raw_type":"Dataset"}],"best_oa_location":{"id":"doi:10.1371/journal.pone.0026427","doi":"https://doi.org/10.1371/journal.pone.0026427","is_oa":true,"landing_page_url":"https://doi.org/10.1371/journal.pone.0026427","pdf_url":"https://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0026427&type=printable","source":{"id":"https://openalex.org/S202381698","display_name":"PLoS ONE","issn_l":"1932-6203","issn":["1932-6203"],"is_oa":true,"is_in_doaj":true,"is_core":true,"listed_in":["anvur-class-a","anvur-scientific","cwts-core","doaj","dongbi-c","doyens","erih-plus","jufo-1","ki-jl-1","medline","norway-1","poland-100","russia-white-list-1","vabb-shw"],"host_organization":"https://openalex.org/P4310315706","host_organization_name":"Public Library of Science","host_organization_lineage":["https://openalex.org/P4310315706"],"host_organization_lineage_names":["Public Library of Science"],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"PLoS ONE","raw_type":"journal-article"},"sustainable_development_goals":[{"score":1.0,"id":"https://metadata.un.org/sdg/3","display_name":"Good health and well-being"}],"study_designs":[{"id":"https://openalex.org/study-designs/observational-study","display_name":"Observational Study"}],"awards":[],"funders":[{"id":"https://openalex.org/F4320312568","display_name":"Public Health Agency of Canada","ror":"https://ror.org/023xf2a37"},{"id":"https://openalex.org/F4320320853","display_name":"Public Health Agency","ror":"https://ror.org/03ek62e72"}],"has_content":{"grobid_xml":true,"pdf":true},"content_urls":{"pdf":"https://content.openalex.org/works/W2002395725.pdf","grobid_xml":"https://content.openalex.org/works/W2002395725.grobid-xml"},"referenced_works_count":31,"referenced_works":["https://openalex.org/W67387822","https://openalex.org/W1808739935","https://openalex.org/W1976033963","https://openalex.org/W1981094841","https://openalex.org/W1986315221","https://openalex.org/W2013947852","https://openalex.org/W2021481766","https://openalex.org/W2022168893","https://openalex.org/W2031778215","https://openalex.org/W2037149588","https://openalex.org/W2041700281","https://openalex.org/W2052773105","https://openalex.org/W2058762746","https://openalex.org/W2068592034","https://openalex.org/W2072654813","https://openalex.org/W2080355293","https://openalex.org/W2097399384","https://openalex.org/W2100397924","https://openalex.org/W2110949543","https://openalex.org/W2117216900","https://openalex.org/W2119343596","https://openalex.org/W2144555928","https://openalex.org/W2170155793","https://openalex.org/W2170782396","https://openalex.org/W2170786480","https://openalex.org/W2172059715","https://openalex.org/W2399248597","https://openalex.org/W2410366014","https://openalex.org/W2411667492","https://openalex.org/W4297925068","https://openalex.org/W4298334804"],"related_works":["https://openalex.org/W2080474989","https://openalex.org/W2067442309","https://openalex.org/W1972088336","https://openalex.org/W2080080022","https://openalex.org/W2324000627","https://openalex.org/W7097143260","https://openalex.org/W7095155942","https://openalex.org/W7096198393","https://openalex.org/W2025299779","https://openalex.org/W2156534583"],"abstract_inverted_index":{"BACKGROUND:":[0],"We":[1],"designed":[2],"a":[3,60,190],"seroprevalence":[4,17,110],"study":[5],"using":[6,77],"multiple":[7],"testing":[8],"assays":[9],"and":[10,20,30,51,53,91,101,124,135,141,149],"population":[11,168,176],"sources":[12,177],"to":[13,34,171],"estimate":[14],"the":[15,26,32,35,81,127,130,153,167,194],"community":[16],"of":[18,37,68,129,166,178,193,196],"pH1N1/09":[19],"risk":[21,69,136],"factors":[22,70,137],"for":[23],"infection":[24],"before":[25],"outbreak":[27],"was":[28,71,169],"recognized":[29],"throughout":[31],"pandemic":[33],"end":[36,128],"2009/10":[38,131],"influenza":[39,132],"season.":[40,133],"METHODS:":[41],"Residual":[42,96],"serum":[43],"specimens":[44],"from":[45,55,59,98,112,120],"five":[46,181],"time":[47,57,182],"points":[48,58,183],"(between":[49],"01/2009":[50],"05/2010)":[52],"samples":[54],"two":[56],"prospectively":[61,103,185],"recruited":[62,104],"cohort":[63,105],"were":[64,85,107,159],"included.":[65],"The":[66],"distribution":[67],"explored":[72],"in":[73,145],"multivariate":[74],"adjusted":[75],"analyses":[76],"logistic":[78],"regression":[79],"among":[80,161],"cohort.":[82],"Antibody":[83],"levels":[84],"measured":[86],"by":[87,126],"hemagglutination":[88],"inhibition":[89],"(HAI)":[90],"microneutralization":[92],"(MN)":[93],"assays.":[94],"RESULTS:":[95],"sera":[97,179],"3375":[99],"patients":[100],"1024":[102],"participants":[106],"analyzed.":[108],"Pre-pandemic":[109],"ranged":[111,119],"2%-12%":[113],"across":[114,180],"age":[115,147],"groups.":[116],"Overall":[117],"seropositivity":[118],"10%-19%":[121],"post-first":[122],"wave":[123],"32%-41%":[125],"Seroprevalence":[134],"differed":[138],"between":[139,150],"MN":[140],"HAI":[142],"assays,":[143],"particularly":[144],"older":[146],"groups":[148],"waves.":[151],"Following":[152],"H1N1":[154],"vaccination":[155],"program,":[156],"higher":[157],"GMT":[158],"noted":[160],"vaccinated":[162],"individuals.":[163],"Overall,":[164],"20-30%":[165],"estimated":[170],"be":[172],"infected.":[173],"CONCLUSIONS:":[174],"Combining":[175],"with":[184],"collected":[186],"epidemiological":[187],"information":[188],"yielded":[189],"complete":[191],"description":[192],"evolution":[195],"pH1N1":[197],"infection.":[198]},"counts_by_year":[{"year":2025,"cited_by_count":3},{"year":2023,"cited_by_count":1},{"year":2022,"cited_by_count":1},{"year":2019,"cited_by_count":1},{"year":2018,"cited_by_count":1},{"year":2017,"cited_by_count":3},{"year":2016,"cited_by_count":2},{"year":2015,"cited_by_count":1},{"year":2014,"cited_by_count":1},{"year":2013,"cited_by_count":12},{"year":2012,"cited_by_count":2}],"updated_date":"2026-11-07T11:25:07.637180","created_date":"2016-06-24T00:00:00"}