Intervention group 5-year-olds had fewer episodes of diarrhoea ( -25 % , 95 % confidence intervals [ CI ] = -37 % , -2 % ) , ARIs ( -15 % , 95 % CI = -30 % , -8 % ) , school absences due to illnesses ( -27 % , 95 % CI = -41 % , -18 % ) and eye infections ( -46 % , 95 % CI = -58 % , -31 % ) .