Early estimates of 2014/15 seasonal influenza vaccine effectiveness in preventing influenza-like illness in general practice using the screening method in France

Hum Vaccin Immunother. 2015;11(7):1621-5. doi: 10.1080/21645515.2015.1046661.

Abstract

The ongoing influenza epidemic is characterized by intense activity with most influenza infections due to the A (H3N2) viruses. Using the screening method, mid-season vaccine effectiveness (VE) in preventing influenza-like illness in primary care was estimated to 32% (95% CI; 23 to 40) among risk groups and was 11% (95% CI; -4 to 23) among the elderly (≥ 65 y). The VE in ≥ 65 y was the lowest estimate regarding the 4 previous seasonal influenza epidemics.

Keywords: France; influenza; influenza-like illness; primary care; vaccine effectiveness.

MeSH terms

  • Age Factors
  • Aged
  • France / epidemiology
  • General Practice
  • Humans
  • Influenza A Virus, H3N2 Subtype
  • Influenza Vaccines* / administration & dosage
  • Influenza Vaccines* / immunology
  • Influenza, Human / epidemiology
  • Influenza, Human / prevention & control*
  • Population Surveillance
  • Seasons
  • Vaccination
  • Vaccine Potency

Substances

  • Influenza Vaccines