Table 1.

Exposure histories of subjects with and without reported varicella infection

	Varicella infection reported
No varicella reported	Varicella illness	Previous exposure without infection	Total
Number of subjects	348	80	NA	431
Household exposure to varicella:
Subjects	39	25	6	64
Instances	45	25	6	76
Household exposure to zoster	10	1	0	11
Home visitors with varicella:
Subjects exposed	60	38	10	98
Instances	114	38	19	171
Total known exposures
Subjects	109	64	16	173
Instances	169	64	25	258

NA Not applicable