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	2991	1.1
41	0	0	8	0	3	8	3064	0.62
42	0	2	9	0	8	8	3216	0.84
43	0	0	12	0	19	12	3459	1.24
44	0	1	16	0	11	9	3743	0.99
45	0	2	14	0	17	15	3938	1.22
46	0	1	14	0	16	14	4177	1.08
47	0	2	21	0	28	19	3707	1.89
48	0	0	33	0	22	17	4222	1.71
49	0	5	37	0	30	17	4446	2
50	0	3	77	0	29	18	4647	2.73
51	0	7	104	0	54	23	4639	4.05
52	0	4	102	0	45	16	4950	3.37
01	0	12	102	0	44	19	5187	3.41
02	0	29	137	0	46	17	5066	4.52
03	0	42	181	0	60	17	4935	6.08
04	0	69	240	0	112	28	5443	8.25
05	0	94	346	0	162	38	5426	11.8
06	0	121	387	0	206	52	5534	13.84
07	0	147	407	0	312	56	6017	15.32
08	0	207	538	0	366	59	6204	18.86
09	0	211	388	0	366	54	4776	21.34