Figure 3. Effectiveness of trivalent seasonal influenza vaccine, for each epidemic, by age-group (15–64 year-old, over 65 year-old and overall) estimated by the French Sentinelles Network.

Colors and types of point indicate the dominant or co-dominant viral subtype for each epidemic. Segments delimitate the 95% confidence intervals of the point estimates (circles or squared dots). Epidemic seasons are indicated above each estimation. Epidemics 2009–2010 and 2010–2011 are not shown.