Fig. 3From: School-based surveillance of acute infectious disease in children: a systematic reviewPercentage of illness absenteeism at baseline and peak during influenza season or outbreak, with 95% confidence intervals. *No published confidence interval; (A) 2011/12 estimate; (B) 2012/13 estimate; (C) 4–11 year olds; (D) 11–16 year oldsBack to article page