Effectiveness of influenza vaccination programme in preventing hospital admissions, Valencia, 2014/15 early results

Euro Surveill. 2015 Feb 26;20(8):21044. doi: 10.2807/1560-7917.es2015.20.8.21044.

Abstract

Preliminary results for the 2014/15 season indicate low to null effect of vaccination against influenza A(H3N2)-related disease. As of week 5 2015, there have been 1,136 hospital admissions, 210 were due to influenza and 98% of subtype A strains were H3. Adjusted influenza vaccine effectiveness was 33% (range: 6-53%) overall and 40% (range: 13% to 59%) in those 65 years and older. Vaccination reduced by 44% (28-68%) the probability of admission with influenza.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adolescent
  • Adult
  • Aged
  • Aged, 80 and over
  • Female
  • Hospitalization / statistics & numerical data*
  • Humans
  • Immunization Programs
  • Influenza A virus / classification
  • Influenza A virus / immunology*
  • Influenza A virus / isolation & purification
  • Influenza Vaccines / administration & dosage*
  • Influenza Vaccines / immunology
  • Influenza, Human / diagnosis
  • Influenza, Human / epidemiology
  • Influenza, Human / prevention & control*
  • Male
  • Middle Aged
  • Program Evaluation
  • Risk Factors
  • Vaccination / statistics & numerical data*
  • Young Adult

Substances

  • Influenza Vaccines