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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	2992	1.1
41	0	0	9	0	2	8	3061	0.62
42	0	2	9	0	8	8	3212	0.84
43	0	0	12	0	19	12	3458	1.24
44	0	1	17	0	11	9	3794	1
45	0	2	14	0	17	15	3983	1.21
46	0	1	14	0	16	14	4221	1.07
47	0	2	21	0	28	19	3760	1.86
48	0	1	33	0	21	17	4267	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	4689	4.01
52	0	4	104	0	43	16	4989	3.35
01	0	16	105	0	37	19	5229	3.38
02	0	30	139	0	43	17	5103	4.49
03	0	45	196	0	50	17	5058	6.09
04	0	74	253	0	98	28	5565	8.14
05	0	121	364	0	123	40	5542	11.69
06	0	155	417	0	159	53	5849	13.4
07	0	208	498	0	245	66	6516	15.61
08	0	290	682	0	324	70	6876	19.87
09	0	422	945	0	383	102	7601	24.37
10	0	432	1113	0	432	98	7287	28.48
11	0	519	1281	0	452	177	7584	32.03
12	0	376	931	0	340	203	6574	28.14
13	0	291	569	0	263	195	5617	23.46
14	0	133	267	0	207	149	3607	20.96