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	69	6833	15.35
08	0	295	690	0	0	326	75	7103	19.51
09	0	443	986	0	0	388	106	8004	24.03
10	0	494	1221	0	0	445	116	7966	28.57
11	0	574	1393	0	0	467	196	8257	31.85
12	0	436	1091	0	0	391	241	7575	28.5
13	0	306	717	0	0	290	239	7011	22.14
14	0	266	628	0	0	273	270	6227	23.08
15	0	187	591	0	0	177	290	5893	21.13
16	0	123	548	0	0	173	313	5435	21.29
17	0	82	366	0	0	129	269	4628	18.28
18	0	64	310	0	0	96	247	4179	17.16
19	0	39	233	0	0	76	266	3774	16.27
20	0	34	167	0	0	56	252	3556	14.31
21	0	18	88	0	0	63	253	3466	12.18
22	0	16	85	0	0	46	224	3014	12.31
23	0	16	48	0	0	40	200	2979	10.2
24	0	9	63	0	0	52	179	2719	11.14
25	0	3	38	0	0	26	104	2329	7.34
26	0	3	26	0	0	22	117	2116	7.94
27	0	5	16	0	0	13	57	1818	5.01
28	0	4	36	1	0	15	43	1907	5.19
29	0	0	18	0	0	11	47	1932	3.93
30	0	2	49	9	0	10	31	1928	5.24
31	0	1	65	95	0	4	35	1938	10.32
32	0	3	63	73	0	8	26	2098	8.25
33	0	5	71	44	0	10	28	2215	7.13
34	0	7	44	15	0	14	24	2328	4.47
35	0	1	26	12	0	11	16	2169	3.04
36	0	1	6	6	0	10	14	1838	2.01