Table 1. Characteristics of 26 exposed persons during a waterborne outbreak of norovirus, Spain*.

Person no.	Age, y	Duration of symptoms, days	Daily water intake, mL†	Secretor status	ABO blood type	Virus genogroup	Virus genotype
1	46	2	200–600	+	NA	I	GI.P2_GI.2
2	25	2	200–600	+	NA	II	GII.P17_GII.17
3	58	4	200–600	+	NA	II	GII.P17_GII.17
4	45	5	200–600	–	O	I	GI.P2_GI.2
5‡	29	3	200–600	+	O	NA	NA
6‡	31	1	200–600	+	O	NA	NA
7	34	2	200–600	–	O	I	GIP2_GI.2
8	42	4	200–600	+	O	I + II	GI.P2_GI.2
9	45	5	601–1,000	–	NA	I	NA
10	32	3	601–1,000	+	A	I + II	GI.P2_GI.2 and GII.P17_GII.17
11	29	4	601–1,000	+	B	I + II	GII.P17_GII.17
12	26	6	601–1,000	+	O	I + II	GI.P2_GI.2
13	41	9	601–1000	+	O	I + II	NA
14	25	4	>1,000	+	NA	I + II	GII.P2_GII.2
15	55	2	>1,000	+	A	I + II	GI.P2_GI.2
16‡	27	0	200–600	–	NA	NA	NA
17‡	52	0	200–600	–	AB	NA	NA
18‡	54	0	200–600	+	NA	NA	NA
19‡	47	0	200–600	+	O	NA	NA
20‡	59	0	200–600	+	O	NA	NA
21‡	30	0	200–600	+	O	NA	NA
22‡	59	0	200–600	–	O	NA	NA
23‡	NA	0	200–600	+	O	NA	NA
24‡	33	0	601–1,000	+	NA	NA	NA
25‡	38	0	>1,000	–	NA	NA	NA
26‡	42	0	>1,000	–	NA	NA	NA

*NA, not available; –, negative; +, positive.
†Plastic glasses used by persons to drink water had a volume of 200 mL.
‡These persons did not provide a stool sample.