title: Effectiveness of seasonal influenza vaccine in preventing influenza primary care visits and hospitalisation in Auckland, New Zealand in 2015: interim estimates.
abstract: Preliminary results for influenza vaccine effectiveness (VE) against acute respiratory illness with circulating laboratory-confirmed influenza viruses in New Zealand from 27 April to 26 September 2015, using a case test-negative design were 36% (95% confidence interval (CI): 11-54) for general practice encounters and 50% (95% CI: 20-68) for hospitalisations. VE against hospitalised influenza A(H3N2) illnesses was moderate at 53% (95% CI: 6-76) but improved compared with previous seasons.
authors.affiliation: Institute of Environmental Science and Research, Wellington, New Zealand.
authors.forename: A
authors.initials: A
authors.lastname: Bissielo
authors.forename: N
authors.initials: N
authors.lastname: Pierse
authors.forename: Q S
authors.initials: QS
authors.lastname: Huang
authors.forename: M G
authors.initials: MG
authors.lastname: Thompson
authors.forename: H
authors.initials: H
authors.lastname: Kelly
authors.forename: V P
authors.initials: VP
authors.lastname: Mishin
authors.forename: N
authors.initials: N
authors.lastname: Turner
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D016022:Case-Control Studies; D002648:Child; D002675:Child, Preschool; D005260:Female; D006760:Hospitalization / Q000706:statistics & numerical data*; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D053118:Influenza A Virus, H1N1 Subtype / Q000235:genetics / Q000276:immunology* / Q000302:isolation & purification; D007252:Influenza Vaccines / Q000008:administration & dosage* / Q000276:immunology; D007251:Influenza, Human / Q000453:epidemiology / Q000276:immunology / Q000517:prevention & control* / Q000821:virology; D016015:Logistic Models; D008297:Male; D008875:Middle Aged; D015999:Multivariate Analysis; D009520:New Zealand / Q000453:epidemiology; D011320:Primary Health Care; D020133:Reverse Transcriptase Polymerase Chain Reaction; D012621:Seasons; D018571:Sentinel Surveillance; D014505:Urban Population / Q000706:statistics & numerical data; D014611:Vaccination; D055815:Young Adult
chemical_list: D007252:Influenza Vaccines
keywords: New Zealand; air-borne infections; epidemiology; influenza; vaccines and immunisation; viral infections