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	2952	1.12
41	0	0	9	0	2	8	3066	0.62
42	0	2	9	0	8	8	3209	0.84
43	0	0	12	0	19	12	3460	1.24
44	0	1	17	0	11	9	3793	1
45	0	2	14	0	17	15	3985	1.2
46	0	1	14	0	16	14	4221	1.07
47	0	2	21	0	28	19	3749	1.87
48	0	1	33	0	21	17	4257	1.69
49	0	5	38	0	29	17	4489	1.98
50	0	3	77	0	29	19	4666	2.74
51	0	7	104	0	54	23	4686	4.01
52	0	4	104	0	43	16	4986	3.35
01	0	16	105	0	37	19	5228	3.39
02	0	30	139	0	43	17	5096	4.49
03	0	45	196	0	50	17	5054	6.09
04	0	74	253	0	98	28	5564	8.14
05	0	121	364	0	123	40	5539	11.7
06	0	155	417	0	159	53	5843	13.42
07	0	207	498	0	245	66	6504	15.62
08	0	289	682	0	320	70	6813	19.98
09	0	422	942	0	383	101	7592	24.34
10	0	430	1103	0	430	98	7123	28.93
11	0	503	1204	0	462	175	7211	32.51
12	0	352	841	0	331	186	6261	27.31
13	0	182	377	0	241	132	4551	20.48