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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	14	0	7	9	2992	1.1
41	0	0	9	0	2	8	3059	0.62
42	0	2	9	0	8	8	3213	0.84
43	0	0	12	0	19	12	3457	1.24
44	0	1	17	0	11	9	3792	1
45	0	2	14	0	17	15	3984	1.2
46	0	1	14	0	16	14	4221	1.07
47	0	2	21	0	28	19	3757	1.86
48	0	1	33	0	21	17	4268	1.69
49	0	5	38	0	29	17	4496	1.98
50	0	3	77	0	29	19	4669	2.74
51	0	7	105	0	54	23	4691	4.03
52	0	4	104	0	43	16	4988	3.35
01	0	16	105	0	37	19	5230	3.38
02	0	30	139	0	43	17	5100	4.49
03	0	47	196	0	50	17	5061	6.13
04	0	77	256	0	95	28	5569	8.19
05	0	121	364	0	123	40	5543	11.69
06	0	157	417	0	159	53	5853	13.43
07	0	210	500	0	243	66	6537	15.59
08	0	296	680	0	325	69	6886	19.9
09	0	428	941	0	388	102	7701	24.14
10	0	472	1117	0	437	103	7599	28.02
11	0	546	1309	0	459	179	7864	31.7
12	0	419	1017	0	372	223	7284	27.88
13	0	322	687	0	283	221	6560	23.06
14	0	266	571	0	258	231	5549	23.9
15	0	173	469	0	144	238	4953	20.67
16	0	70	270	1	129	160	2952	21.34