Table 3.

Clinical features in 121 prospectively followed infected contacts (prior and co-primary infected contacts excluded).

Feature	Level	n/N	% (95% CI)	P-value
Proportion reporting one or more solicited symptoms		94/121	78%
Proportion with one or more solicited  symptoms  by age (years)	0 to10	13/18	72%	0.440
	11to18	15/21	71%
	19to54	57/69	83%
	>=55	9/13	69%
Proportion with symptoms  by presence of co-morbidity	None	73/96	76%	0.590
	Any	21/25	84%
Proportion symptomatic with  respiratory symptoms	0 to10	9/13	69%
	11to18	15/15	100%	P = 0.034
	19to54	53/57	93%
	>=55	9/9	100%
Proportion symptomatic  with loss of taste/smell	0 to10	3/12*	25%
	11to18	4/15	27%	P = 0.0001
	19to54	39/57	68%
	>=55	6/9	67%
Proportion symptomatic with systemic symptoms	0 to10	13/13	109 4 0%
	11to18	14/15	93%	P = 0.635
	19to54	56/57	98%
	>=55	9/9	100%
Mean number of  symptoms	0 to10	4.4
	11to18	5.8		P = 0.001
	19to54	7.4
	>=55	7.4

^{*symptom not known for one child}.