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	2965	1.11
41	0	0	6	0	5	8	3041	0.62
42	0	2	8	0	9	8	3193	0.85
43	0	0	11	0	19	12	3427	1.23
44	0	1	16	0	11	9	3714	1
45	0	2	13	0	18	15	3900	1.23
46	0	0	13	0	19	14	4157	1.11
47	0	2	19	0	30	19	3688	1.9
48	0	0	30	0	25	17	4187	1.72
49	0	5	35	0	32	17	4414	2.02
50	0	3	67	0	37	18	4607	2.71
51	0	7	92	0	65	23	4606	4.06
52	0	4	101	0	45	16	4865	3.41
01	0	12	98	0	44	19	5045	3.43
02	0	25	129	0	45	15	4729	4.53
03	0	28	151	0	49	16	4340	5.62
04	0	36	123	0	88	15	3656	7.17