title: Factors associated with seropositivity of 2009 H1N1 influenza in Beijing, China.
authors.forename: Wenting
authors.initials: W
authors.lastname: Liu
authors.forename: Peng
authors.initials: P
authors.lastname: Yang
authors.forename: Wei
authors.initials: W
authors.lastname: Duan
authors.forename: Xiaoli
authors.initials: X
authors.lastname: Wang
authors.forename: Yi
authors.initials: Y
authors.lastname: Zhang
authors.forename: Quanyi
authors.initials: Q
authors.lastname: Wang
mesh_terms: D000293:Adolescent; D000328:Adult; D000914:Antibodies, Viral / Q000097:blood*; D016022:Case-Control Studies; D002681:China / Q000453:epidemiology; D005260:Female; D006801:Humans; D053118:Influenza A Virus, H1N1 Subtype / Q000276:immunology*; D007252:Influenza Vaccines / Q000276:immunology; D007251:Influenza, Human / Q000453:epidemiology* / Q000821:virology; D008297:Male; D012307:Risk Factors; D011795:Surveys and Questionnaires; D055815:Young Adult
chemical_list: D000914:Antibodies, Viral; D007252:Influenza Vaccines