Figure 8.
Cumulative, age-specific influenza indicators in pilot and non-pilot areas, England, week 40 2011–week 20 2016a
ILI: influenza-like illness; RCGP: Royal College of General Practitioners; USISS: United Kingdom Severe Influenza Surveillance System.
a For the 2013/14 season, the data are based on week 40 2013 to week 15 2014 as per previously published work [6]. The primary pilot areas in the 2013/14 season were applied to calculate rates at each reporting level. Similarly, for the 2014/15 season, the data are based on week 40 2014 to week 14 2015 as per previously published work [7]. The primary pilot areas in the 2014/15 season were applied to calculate rates at each reporting level, excluded secondary pilots areas.
