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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	2972	1.11
41	0	0	6	0	5	8	3033	0.63
42	0	2	8	0	9	8	3202	0.84
43	0	0	11	0	20	12	3428	1.25
44	0	1	16	0	11	9	3700	1
45	0	2	12	0	18	15	3894	1.21
46	0	0	13	0	18	14	4142	1.09
47	0	1	19	0	30	19	3622	1.91
48	0	0	27	0	25	17	4059	1.7
49	0	4	32	0	30	17	4234	1.96
50	0	1	53	0	30	14	4049	2.42
51	0	2	36	0	52	7	2652	3.66