Fig 3. Trends in vaccination coverage (%) and influenza-like illness (ILI) or acute respiratory infection (ARI) incidence (per 10,000 persons) for the elderly population of European countries.

^a Vaccination coverage of the elderly population measured for age ≥60 years instead of ≥65 years. ^b Increase in vaccination coverage in the 1996/1997 season in the Netherlands was attributable to a new population-wide policy, which reimburses general practitioners for each injected influenza vaccination. ^c Increase in vaccination coverage in the 2007/2008 season in Romania was due to active promotion of the influenza vaccine by the National Influenza Centre of Romania (personal communication with V. Alexandrescu (20 February 2015)).