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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	3147	1.05
41	0	0	9	0	2	8	3269	0.58
42	0	2	10	0	8	8	3405	0.82
43	0	0	12	0	19	12	3652	1.18
44	0	1	17	0	11	9	3990	0.95
45	0	2	15	0	17	15	4197	1.17
46	0	1	15	0	16	14	4441	1.04
47	0	2	23	0	29	19	4006	1.82
48	0	2	32	0	22	17	4573	1.6
49	0	5	38	0	43	20	4597	2.31
50	0	4	78	0	28	19	4778	2.7
51	0	7	104	0	57	24	4854	3.96
52	0	4	105	0	47	17	5148	3.36
01	0	16	105	0	38	21	5333	3.38
02	0	30	139	0	44	16	5130	4.46
03	0	48	196	0	50	17	5126	6.07
04	0	80	256	0	96	30	5645	8.18
05	0	122	364	0	127	41	5699	11.48
06	0	161	419	0	156	54	5942	13.3
07	0	216	505	0	250	67	6685	15.53
08	0	294	686	0	327	73	6953	19.85
09	0	434	959	0	388	103	7786	24.2
10	0	483	1147	0	444	105	7690	28.34
11	0	557	1320	0	469	178	7983	31.62
12	0	423	1032	0	376	220	7295	28.12
13	0	306	693	0	286	231	6763	22.42
14	0	262	611	0	268	255	5988	23.31
15	0	187	561	0	174	282	5603	21.49
16	0	118	516	0	171	306	5201	21.36
17	0	72	347	0	126	264	4287	18.87
18	0	52	277	0	94	224	3810	16.98
19	0	34	218	0	71	224	3131	17.47
20	0	21	88	0	41	136	2054	13.92