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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	2990	1.1
41	0	0	9	0	2	8	3065	0.62
42	0	2	9	0	8	8	3212	0.84
43	0	0	12	0	19	12	3461	1.24
44	0	1	17	0	11	9	3743	1.02
45	0	2	14	0	17	15	3934	1.22
46	0	1	14	0	16	14	4175	1.08
47	0	2	21	0	28	19	3707	1.89
48	0	0	33	0	22	17	4226	1.7
49	0	5	38	0	29	17	4449	2
50	0	3	77	0	29	18	4649	2.73
51	0	7	104	0	54	23	4637	4.05
52	0	4	104	0	43	16	4950	3.37
01	0	12	105	0	41	19	5186	3.41
02	0	29	139	0	44	17	5067	4.52
03	0	42	189	0	53	17	4982	6.04
04	0	69	253	0	103	28	5502	8.23
05	0	95	362	0	148	38	5430	11.84
06	0	123	412	0	185	53	5647	13.69
07	0	159	461	0	277	59	6133	15.59
08	0	223	626	0	350	65	6361	19.87
09	0	299	732	0	400	82	6641	22.78
10	0	172	394	0	483	50	4742	23.18