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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	12	0	9	9	2970	1.11
41	0	0	8	0	3	8	3038	0.63
42	0	2	9	0	8	8	3195	0.85
43	0	0	12	0	19	12	3427	1.25
44	0	1	16	0	11	9	3711	1
45	0	2	14	0	17	15	3903	1.23
46	0	1	14	0	16	14	4155	1.08
47	0	2	21	0	28	19	3686	1.9
48	0	0	33	0	22	17	4189	1.72
49	0	5	37	0	30	17	4413	2.02
50	0	3	75	0	29	18	4606	2.71
51	0	7	104	0	54	23	4612	4.08
52	0	4	101	0	45	16	4872	3.41
01	0	12	98	0	44	19	5056	3.42
02	0	26	129	0	44	15	4826	4.43
03	0	39	171	0	54	17	4567	6.15
04	0	51	193	0	96	22	4769	7.59
05	0	42	178	0	138	20	3586	10.54