Table 3.

Frequency of Subsequent ARI Cases With At-Risk Children Stratified by Age in Households With 1st RSV-ARI + Single RSV-ARI

1st RSV-ARI + Single RSV-ARI		At-Risk Children		Subsequent ARI
Age Group	No.	Age Group	No.	2nd RSV-ARI (%)	Subsequent ARI (%)	Total Subsequent ARI (%)
<6 months old	33	<6 months old	1	0	0	0
		6–11 months old	0	0	0	0
		1 year old	5	0	0	0
		2–4 years old	36	2 (5.6)	3 (8.3)	5 (13.9)
		Subtotal	42	2 (4.8)	3 (7.1)	5 (11.9)
6–11 months old	29	<6 months old	0	0	0	0
		6–11 months old	0	0	0	0
		1 year old	2	1 (50)	1 (50)	2 (100)
		2–4 years old	34	3 (8.8)	2 (5.9)	5 (14.7)
		Subtotal	36	4 (11.1)	3 (8.3)	7 (19.4)
1 year old	58	<6 months old	4	2 (50)	2 (50)	4 (100)
		6–11 months old	4	2 (50)	0	2 (50)
		1 year old	9	2 (22.2)	1 (11.1)	3 (33.3)
		2–4 years old	49	4 (8.2)	7 (14.3)	11 (22.4)
		Subtotal	66	10 (15.2)	10 (15.2)	20 (30.3)
2–4 years old	61	<6 months old	5	3 (60)	1 (20)	4 (80)
		6–11 months old	8	2 (25)	0	2 (25)
		1 year old	17	4 (23.5)	1 (5.9)	5 (29.4)
		2–4 years old	41	6 (14.6)	6 (11.3)	12 (29.3)
		Subtotal	71	15 (21.1)	8 (11.3)	23 (32.4)
Total	181		215	31 (14.4)	24 (11.2)	55 (25.6)

Abbreviations: ARI, acute respiratory infection; RSV, respiratory syncytial virus.