Table 1.

General information of 56 influenza outbreaks in Changsha city, China, 2005–2013 (n = 56)

Outbreak ID	Year	Month	Type of locations	Population	Accumulative cases	DO	Subtypes
1	2009	10	Secondary school	1101	44	14	H1N1pdm
2	2009	11	Secondary school	4644	143	11	H1N1pdm
3	2009	11	Secondary school	1811	77	12	H1N1pdm
4	2009	11	Primary school	1231	71	11	H1N1pdm
5	2009	11	Primary school	1028	58	21	H1N1pdm
6	2009	11	Secondary school	1874	38	10	H1N1pdm
7	2009	11	Secondary school	1192	59	15	H1N1pdm
8	2009	11	Secondary school	1342	256	40	H1N1pdm
9	2009	11	College	1357	61	23	H1N1pdm
10	2009	10	Training school	126	58	9	H1N1pdm
11	2009	10	Primary school	1129	107	14	H1N1pdm
12	2009	9	College	6546	114	22	H1N1pdm
13	2009	10	College	13 485	163	9	H1N1pdm
14	2009	11	Prison	694	83	17	H1N1pdm
15	2009	11	Primary school	264	66	11	H1N1pdm
16	2009	11	Secondary school	1240	100	11	H1N1pdm
17	2009	11	Secondary school	2050	101	14	H1N1pdm
18	2009	11	Secondary school	1138	93	15	H1N1pdm
19	2009	11	Primary school	1563	42	17	H1N1pdm
20	2009	11	Secondary school	4673	17	13	H1N1pdm
21	2009	11	Secondary school	1950	18	4	H1N1pdm
22	2009	10	Secondary school	4290	31	10	H1N1pdm
23	2009	10	Secondary school	2670	95	17	H1N1pdm
24	2009	9	Secondary school	4297	89	19	H1N1pdm
25	2009	10	College	2477	43	7	H1N1pdm
26	2009	9	College	1434	48	13	H1N1pdm
27	2009	11	Primary school	1081	155	21	H1N1pdm
28	2009	10	Secondary school	588	37	15	H1N1pdm
29	2009	11	Primary school	429	19	10	H1N1pdm
30	2009	11	Secondary school	2280	96	43	H1N1pdm
31	2009	11	Secondary school	1251	127	20	H1N1pdm
32	2009	11	Secondary school	1562	121	25	H1N1pdm
33	2009	11	Secondary school	5313	11	21	H1N1pdm
34	2009	11	Secondary school	2396	791	9	H1N1pdm
35	2010	1	Prison	628	86	12	H1N1pdm
36	2009	9	Secondary school	4032	60	15	H1N1pdm
37	2009	11	College	2255	49	15	H1N1pdm
38	2013	1	Secondary school	2500	80	19	H1N1pdm
39	2013	11	Secondary school	1490	44	15	H3N2
40	2013	11	Secondary school	4872	74	17	H3N2 + B
41	2009	8	Community	1900	41	10	H3N2
42	2009	2	Secondary school	7716	336	23	H1N1
43	2009	3	Primary school	671	43	15	B
44	2009	3	Primary school	885	43	13	H1N1 + B
45	2009	3	Secondary school	639	39	8	H1N1
46	2009	3	Secondary school	855	32	7	H1N1
47	2008	2	Primary school	160	28	9	H3N2
48	2008	6	Primary school	125	51	20	B
49	2007	3	Primary school	375	58	15	A (untyped)
50	2007	3	Secondary school	1539	42	9	A (untyped)
51	2006	4	Primary school	110	47	n.a.	Untyped
52	2006	2	Primary school	570	96	11	A (untyped)
53	2006	2	Primary school	187	58	10	A (untyped)
54	2006	2	Secondary school	210	47	13	A (untyped)
55	2005	12	Secondary school	1043	49	9	A (untyped)
56	2005	3	Primary school	317	27	n.a.	n.a.

ID, Identification; DO, duration of outbreak; n.a., not available.