Effectiveness of seasonal influenza vaccine in preventing influenza primary care visits and hospitalisation in Auckland, New Zealand in 2015: interim estimates

Euro Surveill. 2016;21(1). doi: 10.2807/1560-7917.ES.2016.21.1.30101.

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.

Keywords: New Zealand; air-borne infections; epidemiology; influenza; vaccines and immunisation; viral infections.

Publication types

  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Adolescent
  • Adult
  • Aged
  • Case-Control Studies
  • Child
  • Child, Preschool
  • Female
  • Hospitalization / statistics & numerical data*
  • Humans
  • Infant
  • Infant, Newborn
  • Influenza A Virus, H1N1 Subtype / genetics
  • Influenza A Virus, H1N1 Subtype / immunology*
  • Influenza A Virus, H1N1 Subtype / isolation & purification
  • Influenza Vaccines / administration & dosage*
  • Influenza Vaccines / immunology
  • Influenza, Human / epidemiology
  • Influenza, Human / immunology
  • Influenza, Human / prevention & control*
  • Influenza, Human / virology
  • Logistic Models
  • Male
  • Middle Aged
  • Multivariate Analysis
  • New Zealand / epidemiology
  • Primary Health Care*
  • Reverse Transcriptase Polymerase Chain Reaction
  • Seasons
  • Sentinel Surveillance
  • Urban Population / statistics & numerical data
  • Vaccination
  • Young Adult

Substances

  • Influenza Vaccines