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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	5862	11.22
06	0	164	419	0	0	159	55	6111	13.04
07	0	220	506	0	0	255	69	6837	15.36
08	0	295	690	0	0	326	75	7110	19.49
09	0	443	986	0	0	392	107	8029	24.01
10	0	494	1221	0	0	451	116	7979	28.6
11	0	574	1393	0	0	482	197	8295	31.9
12	0	436	1091	0	0	403	241	7611	28.52
13	0	306	717	0	0	299	239	7037	22.18
14	0	266	628	0	0	282	270	6250	23.14
15	0	187	591	0	0	186	290	5918	21.19
16	0	123	548	0	0	173	313	5454	21.21
17	0	82	366	0	0	134	269	4650	18.3
18	0	64	310	0	0	99	247	4194	17.17
19	0	39	233	0	0	76	266	3779	16.25
20	0	34	167	0	0	57	252	3564	14.31
21	0	18	88	0	0	63	253	3471	12.16
22	0	16	85	0	0	46	224	3015	12.31
23	0	16	48	0	0	40	200	2986	10.18
24	0	9	63	0	0	52	179	2723	11.13
25	0	3	38	0	0	26	105	2343	7.34
26	0	3	26	0	0	22	117	2116	7.94
27	0	5	16	0	0	13	57	1817	5.01
28	0	4	36	1	0	15	43	1907	5.19
29	0	0	18	0	0	11	47	1933	3.93
30	0	2	49	9	0	10	31	1928	5.24
31	0	1	65	95	0	4	35	1939	10.31
32	0	3	63	73	0	8	26	2117	8.17
33	0	5	71	51	0	10	28	2233	7.39
34	0	7	44	15	0	14	24	2376	4.38
35	0	1	28	12	0	12	18	2355	3.01
36	0	1	12	6	0	11	29	2403	2.46
37	0	0	4	2	0	10	40	2741	2.04
38	0	1	5	0	0	13	33	2160	2.41