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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	2986	1.11
41	0	0	9	0	2	8	3058	0.62
42	0	2	9	0	8	8	3201	0.84
43	0	0	12	0	19	12	3453	1.25
44	0	1	17	0	11	9	3734	1.02
45	0	2	14	0	17	15	3928	1.22
46	0	1	14	0	16	14	4168	1.08
47	0	2	21	0	28	19	3696	1.89
48	0	1	33	0	21	17	4213	1.71
49	0	5	38	0	29	17	4442	2
50	0	3	77	0	29	18	4626	2.75
51	0	7	104	0	54	23	4626	4.06
52	0	4	104	0	43	16	4942	3.38
01	0	15	105	0	38	19	5229	3.38
02	0	29	139	0	44	17	5090	4.5
03	0	43	196	0	52	17	5044	6.11
04	0	69	253	0	103	28	5553	8.16
05	0	97	363	0	147	40	5520	11.72
06	0	124	414	0	190	53	5826	13.41
07	0	170	497	0	279	64	6432	15.7
08	0	252	676	0	356	70	6794	19.93
09	0	351	932	0	453	100	7560	24.29
10	0	326	1083	0	523	90	7032	28.75
11	0	339	1071	0	589	157	6854	31.46
12	0	135	296	0	378	99	4624	19.64