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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	2991	1.1
41	0	0	9	0	2	8	3060	0.62
42	0	2	9	0	8	8	3213	0.84
43	0	0	12	0	19	12	3457	1.24
44	0	1	17	0	11	9	3792	1
45	0	2	14	0	17	15	3984	1.2
46	0	1	14	0	16	14	4221	1.07
47	0	2	21	0	28	19	3757	1.86
48	0	1	33	0	21	17	4268	1.69
49	0	5	38	0	29	17	4496	1.98
50	0	3	77	0	29	19	4669	2.74
51	0	7	104	0	54	23	4690	4.01
52	0	4	104	0	43	16	4988	3.35
01	0	16	105	0	37	19	5230	3.38
02	0	30	139	0	43	17	5100	4.49
03	0	47	196	0	50	17	5061	6.13
04	0	77	253	0	98	28	5569	8.19
05	0	121	364	0	123	40	5541	11.69
06	0	157	417	0	159	53	5851	13.43
07	0	210	498	0	245	66	6521	15.63
08	0	296	682	0	325	70	6883	19.95
09	0	429	945	0	387	103	7659	24.34
10	0	473	1118	0	434	103	7492	28.4
11	0	545	1288	0	457	177	7771	31.75
12	0	393	949	0	367	206	7014	27.3
13	0	313	587	0	284	212	6231	22.4
14	0	229	453	0	278	215	5280	22.25
15	0	106	289	0	138	120	3730	17.51