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INFLUENZA VIRUSES ISOLATED BY
WHO/NREVSS Collaborating Laboratories
2011 - 2012 Season

Week	A(H1)	A(2009 H1N1)	A(H3)	A(unable to sub-type)	A(Subtyping not performed)	B	Total # Tested	% Positive
40	0	3	14	0	7	9	3148	1.05
41	0	0	9	0	2	8	3103	0.61
42	0	2	9	0	8	8	3246	0.83
43	0	0	12	0	19	12	3496	1.23
44	0	1	17	0	11	9	3835	0.99
45	0	2	14	0	17	15	4034	1.19
46	0	1	14	0	16	14	4266	1.05
47	0	2	22	0	29	19	3817	1.89
48	0	1	32	0	23	17	4345	1.68
49	0	5	38	0	43	20	4598	2.31
50	0	3	78	0	29	19	4774	2.7
51	0	7	104	0	57	24	4852	3.96
52	0	4	105	0	47	17	5145	3.36
01	0	16	104	0	38	21	5328	3.36
02	0	30	139	0	44	16	5128	4.47
03	0	47	196	0	51	17	5120	6.07
04	0	78	256	0	98	30	5640	8.19
05	0	121	364	0	128	41	5698	11.48
06	0	157	419	0	160	54	5941	13.3
07	0	215	505	0	251	67	6684	15.53
08	0	291	686	0	330	73	6954	19.84
09	0	431	958	0	391	103	7785	24.19
10	0	475	1147	0	452	105	7689	28.34
11	0	550	1320	0	476	178	7982	31.62
12	0	420	1032	0	379	220	7294	28.12
13	0	304	693	0	288	231	6761	22.42
14	0	262	610	0	268	255	5936	23.5
15	0	186	560	0	162	282	5502	21.63
16	0	116	509	0	161	304	5167	21.1
17	0	70	301	0	117	258	4084	18.27
18	0	45	198	0	46	163	2889	15.65
19	0	12	79	0	61	136	2171	13.27