title: High prevalence of antibodies to the 2009 pandemic influenza A(H1N1) virus in the Norwegian population following a major epidemic and a large vaccination campaign in autumn 2009.
abstract: The prevalence of antibodies reactive to the 2009 pandemic influenza A(H1N1) was determined in sera collected before the start of the pandemic, during the early phase, and after the main epidemic wave and nationwide vaccination campaign in Norway. A substantial rise in prevalence of antibodies at protective titres, from 3.2% to 44.9%, was observed between August 2009 and January 2010. The highest prevalence, 65.3%, was seen in the age group of 10-19 year-olds.
authors.affiliation: Department of Virology, Norwegian Institute of Public Health, Oslo, Norway.
authors.forename: K
authors.initials: K
authors.lastname: Waalen
authors.forename: A
authors.initials: A
authors.lastname: Kilander
authors.forename: S G
authors.initials: SG
authors.lastname: Dudman
authors.forename: G H
authors.initials: GH
authors.lastname: Krogh
authors.forename: T
authors.initials: T
authors.lastname: Aune
authors.forename: O
authors.initials: O
authors.lastname: Hungnes
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000914:Antibodies, Viral / Q000097:blood*; D002648:Child; D002675:Child, Preschool; D058872:Epidemics; D006801:Humans; D017589:Immunization Programs / Q000706:statistics & numerical data*; D007223:Infant; D053118:Influenza A Virus, H1N1 Subtype / Q000276:immunology*; D007252:Influenza Vaccines / Q000008:administration & dosage; D007251:Influenza, Human / Q000453:epidemiology* / Q000276:immunology / Q000821:virology*; D008875:Middle Aged; D009664:Norway; D011159:Population Surveillance; D012621:Seasons; D055815:Young Adult
chemical_list: D000914:Antibodies, Viral; D007252:Influenza Vaccines