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	2966	1.11
41	0	0	6	0	5	8	3038	0.63
42	0	2	8	0	9	8	3195	0.85
43	0	0	11	0	19	12	3424	1.23
44	0	1	16	0	11	9	3707	1
45	0	2	13	0	18	15	3897	1.23
46	0	0	13	0	19	14	4143	1.11
47	0	2	19	0	30	19	3682	1.9
48	0	0	29	0	25	17	4181	1.7
49	0	5	34	0	32	17	4410	2
50	0	3	65	0	37	18	4605	2.67
51	0	7	91	0	65	23	4589	4.05
52	0	4	99	0	45	14	4720	3.43
01	0	12	92	0	44	16	4808	3.41
02	0	24	117	0	42	12	4533	4.3
03	0	20	101	0	45	9	3572	4.9