Table 1.

Water- and foodborne disease outbreaks by month in Korea, 2007–2009

Year	Total	January	February	March	April	May	June	July	August	September	October	November	December	Patients per outbreak
Total (no.)	1026	52	45	62	86	132	121	93	124	116	65	67	63	24.7
%	100.0	5.1	4.4	6.0	8.4	12.9	11.8	9.1	12.1	11.3	6.3	6.5	6.1
2007	444	22	13	25	31	65	56	46	68	45	23	27	23	22.2
2008	355	14	16	19	31	29	34	25	27	53	34	35	28	24.3
2009	227	16	16	18	24	38	31	22	19	18	8	5	12	30.2