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INFLUENZA VIRUSES ISOLATED BY
WHO/NREVSS Collaborating Laboratories
2011 - 2012 Season

Week	A(H1)	A(2009 H1N1)	A(H3)	H3N2v	A(unable to sub-type)	A(Subtyping not performed)	B	Total # Tested	% Positive
40	0	3	14	0	0	7	9	3197	1.03
41	0	0	9	0	0	2	8	3319	0.57
42	0	2	10	0	0	8	8	3433	0.82
43	0	0	12	0	0	19	12	3707	1.16
44	0	1	17	0	0	11	9	4038	0.94
45	0	2	15	0	0	17	15	4255	1.15
46	0	0	15	0	0	17	11	4503	0.95
47	0	3	23	0	0	29	20	4071	1.84
48	0	2	32	0	0	22	17	4636	1.57
49	0	5	38	0	0	43	20	4667	2.27
50	0	4	78	0	0	28	19	4859	2.65
51	0	7	104	0	0	57	24	4981	3.85
52	0	4	107	0	0	47	17	5331	3.28
01	0	16	101	0	0	38	22	5558	3.18
02	0	31	138	0	0	45	15	5276	4.34
03	0	50	195	0	0	50	17	5259	5.93
04	0	84	256	0	0	96	30	5775	8.07
05	0	124	365	0	0	128	41	5859	11.23
06	0	164	419	0	0	157	55	6097	13.04
07	0	220	506	0	0	254	68	6832	15.34
08	0	295	690	0	0	326	75	7103	19.51
09	0	443	986	0	0	388	106	8004	24.03
10	0	492	1220	0	0	445	114	7960	28.53
11	0	574	1393	0	0	467	195	8256	31.84
12	0	435	1079	0	0	394	235	7550	28.38
13	0	306	698	0	0	291	234	6950	22
14	0	264	618	0	0	272	261	6161	22.97
15	0	187	571	0	0	177	288	5830	20.98
16	0	121	541	0	0	173	310	5395	21.22
17	0	82	357	0	0	129	269	4595	18.22
18	0	64	302	0	0	96	238	4135	16.93
19	0	39	228	0	0	76	261	3747	16.12
20	0	34	164	0	0	56	251	3533	14.29
21	0	17	85	0	0	63	250	3441	12.06
22	0	15	85	0	0	46	223	2996	12.32
23	0	14	48	0	0	40	200	2963	10.19
24	0	9	63	0	0	52	178	2711	11.14
25	0	3	38	0	0	26	104	2324	7.36
26	0	3	26	0	0	22	117	2108	7.97
27	0	5	16	0	0	13	57	1815	5.01
28	0	4	35	1	0	15	43	1903	5.15
29	0	0	18	0	0	11	47	1928	3.94
30	0	2	48	9	0	10	31	1911	5.23
31	0	1	64	95	0	4	34	1916	10.33
32	0	3	63	73	0	8	26	2056	8.41
33	0	5	70	39	0	10	28	2151	7.07
34	0	5	43	9	0	4	18	2006	3.94
35	0	0	19	5	0	2	6	1075	2.98