Table 2. The composition of the enteroviruses types in the children with HFMD in each sampling month and region.

Date	CV-A10			CV-A6		EV-71			CV-A16			Other types			Negative	Total
	n	%		n	%	n	%		n	%		n	%		n	%	n
Mar-09	0	0.0		0	0.0	7	53.8		4	30.8		0	0.0		2	15.4	13
Apr-09	2	1.7		1	0.9	69	59.5		15	12.9		6	5.2		24	20.7	116
May-09	0	0.0		3	5.6	21	38.9		14	25.9		2	3.7		14	25.9	54
Jun-09	0	0.0		1	9.1	3	27.3		2	18.2		1	9.1		4	36.4	11
Jul-09	0	0.0		0	0.0	55	43.0		60	46.9		3	2.3		9	7.0	128
Aug-09	0	0.0		0	0.0	4	44.4		1	11.1		1	11.1		3	33.3	9
Oct-09	0	0.0		0	0.0	1	100.0		0	0.0		0	0.0		0	0.0	1
Feb-10	0	0.0		0	0.0	1	50.0		1	50.0		0	0.0		0	0.0	2
Mar-10	2	7.1		0	0.0	12	42.9		11	39.3		2	7.1		1	3.6	28
Apr-10	5	3.7		10	7.5	59	44.0		55	41.0		13	9.7		2	1.5	134
May-10	38	10.4		14	3.8	152	41.5		130	35.5		29	7.9		12	3.3	366
Jun-10	15	9.3		4	2.5	76	47.2		52	32.3		8	5.0		10	6.2	161
Jul-10	10	4.0		2	0.8	168	68.0		43	17.4		13	5.3		11	4.5	247
Aug-10	3	3.3		1	1.1	59	64.1		9	9.8		12	13.0		8	8.7	92
Sep-10	0	0.0		0	0.0	7	70.0		0	0.0		0	0.0		3	30.0	10
Oct-10	1	1.6		2	3.1	28	43.8		16	25.0		4	6.3		12	18.8	64
Nov-10	0	0.0		0	0.0	22	46.8		15	31.9		1	2.1		7	14.9	47
Dec-10	1	7.1		1	7.1	9	64.3		2	14.3		2	14.3		0	0.0	14
Mar-11	0	0.0		0	0.0	3	75.0		1	25.0		0	0.0		0	0.0	4
Apr-11	1	1.4		2	2.9	56	81.2		4	5.8		3	4.3		5	7.2	69
May-11	4	3.1		6	4.7	90	69.8		12	9.3		13	10.1		10	7.8	129
Jun-11	0	0.0		1	2.3	36	83.7		3	7.0		2	4.7		2	4.7	43
Jul-11	0	0.0		0	0.0	6	100.0		0	0.0		0	0.0		0	0.0	6
Aug-11	0	0.0		0	0.0	0	0.0		1	100.0		0	0.0		0	0.0	1
Year
2009	2	0.6		5	1.5	160	48.2		96	28.9		13	3.9		56	16.9	332
2010	75	6.4		34	2.9	593	50.9		334	28.7		84	7.2		66	5.7	1165
2011	5	2.0		9	3.6	191	75.8		21	8.3		18	7.1		17	6.7	252
P	<0.001			0.261		<0.001			<0.001			0.094			<0.001
Region
Chongqing	26		3.4	15	1.9	446		57.9	208		27.0	25		3.2	50	6.5	770
Shandong	53		7.2	27	3.6	318		42.9	221		29.8	44		5.9	78	10.5	741
Henan	3		1.3	2	0.8	180		75.9	22		9.3	19		8.0	11	4.6	237
P	<0.001			0.023		<0.001			<0.001			0.005			0.002