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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	21	17	4343	1.63
49	0	5	38	0	31	17	4563	1.99
50	0	3	78	0	29	19	4750	2.72
51	0	7	104	0	54	23	4832	3.89
52	0	4	105	0	43	16	5118	3.28
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	5697	11.48
06	0	157	418	0	160	54	5941	13.28
07	0	215	504	0	251	67	6680	15.52
08	0	291	685	0	330	73	6953	19.83
09	0	430	953	0	391	102	7774	24.13
10	0	474	1137	0	452	105	7672	28.26
11	0	548	1306	0	476	178	7962	31.5
12	0	418	1020	0	374	218	7214	28.14
13	0	323	696	0	287	229	6729	22.81
14	0	272	607	0	268	252	5933	23.58
15	0	186	552	0	162	280	5478	21.54
16	0	114	516	0	161	298	4939	22.05
17	0	68	270	0	124	237	3877	18.03
18	0	25	113	0	50	103	2118	13.74