title: Outbreak of 2009 pandemic influenza A(H1N1) in a Finnish garrison--a serological survey.
abstract: In September 2009, an outbreak of 2009 pandemic influenza A(H1N1) took place in a Finnish garrison. In November 2009, we performed a serological survey among 984 recruits undergoing their military service at the garrison and related the results to self-reported upper respiratory tract infection (URTI) with or without fever. Of 346 volunteers who donated a blood sample, 169 (49%) had pandemic influenza A(H1N1) virus-specific antibodies. Of those, 84 (50%) reported no recent history of URTI, suggesting that a major part of those infected with pandemic influenza A(H1N1) virus may be asymptomatic.
authors.affiliation: Centre for Military Medicine, Research and Development Department, Helsinki, Finland.
authors.forename: M
authors.initials: M
authors.lastname: Aho
authors.forename: O
authors.initials: O
authors.lastname: Lyytikaïnen
authors.forename: J E
authors.initials: JE
authors.lastname: Nyholm
authors.forename: T
authors.initials: T
authors.lastname: Kuitunen
authors.forename: E
authors.initials: E
authors.lastname: Rönkkö
authors.forename: R
authors.initials: R
authors.lastname: Santanen
authors.forename: T
authors.initials: T
authors.lastname: Ziegler
authors.forename: S
authors.initials: S
authors.lastname: Nikkari
mesh_terms: D000328:Adult; D000914:Antibodies, Viral / Q000097:blood*; D003429:Cross Reactions; D005260:Female; D005334:Fever / Q000209:etiology; D005387:Finland / Q000453:epidemiology; D006385:Hemagglutination Inhibition Tests; D006801:Humans; D053118:Influenza A Virus, H1N1 Subtype / Q000235:genetics / Q000276:immunology; D007251:Influenza, Human / Q000453:epidemiology* / Q000276:immunology / Q000821:virology; D008297:Male; D008889:Military Personnel; D058873:Pandemics / Q000706:statistics & numerical data*; D015995:Prevalence; D012141:Respiratory Tract Infections / Q000453:epidemiology; D020133:Reverse Transcriptase Polymerase Chain Reaction; D057566:Self Report; D016036:Seroepidemiologic Studies; D011795:Surveys and Questionnaires; D055815:Young Adult
chemical_list: D000914:Antibodies, Viral