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	3317	0.57
42	0	2	10	0	0	8	8	3431	0.82
43	0	0	12	0	0	19	12	3710	1.16
44	0	1	17	0	0	11	9	4035	0.94
45	0	2	15	0	0	17	15	4258	1.15
46	0	0	15	0	0	17	11	4501	0.96
47	0	3	23	0	0	29	20	4068	1.84
48	0	2	32	0	0	22	17	4645	1.57
49	0	5	38	0	0	43	20	4669	2.27
50	0	4	78	0	0	28	19	4860	2.65
51	0	7	104	0	0	57	24	4981	3.85
52	0	4	107	0	0	47	17	5335	3.28
01	0	16	101	0	0	38	22	5555	3.19
02	0	31	138	0	0	45	15	5283	4.33
03	0	50	195	0	0	50	17	5267	5.92
04	0	84	256	0	0	96	30	5774	8.07
05	0	124	365	0	0	128	41	5857	11.23
06	0	164	419	0	0	157	55	6096	13.04
07	0	220	506	0	0	254	68	6833	15.34
08	0	295	689	0	0	326	75	7100	19.51
09	0	437	964	0	0	388	104	7953	23.8
10	0	485	1154	0	0	445	107	7811	28.05
11	0	561	1332	0	0	466	183	8109	31.35
12	0	428	1033	0	0	391	224	7429	27.94
13	0	306	698	0	0	290	234	6932	22.04
14	0	262	615	0	0	272	260	6153	22.9
15	0	187	571	0	0	177	288	5830	20.98
16	0	121	541	0	0	173	310	5396	21.22
17	0	82	357	0	0	129	269	4596	18.21
18	0	64	302	0	0	96	238	4135	16.93
19	0	39	228	0	0	76	261	3748	16.12
20	0	34	164	0	0	56	251	3534	14.29
21	0	17	85	0	0	63	250	3439	12.07
22	0	15	84	0	0	46	223	2993	12.3
23	0	14	47	0	0	40	200	2963	10.16
24	0	9	63	0	0	52	178	2710	11.14
25	0	3	35	0	0	26	104	2321	7.24
26	0	3	26	0	0	22	117	2107	7.97
27	0	5	16	0	0	13	56	1774	5.07
28	0	4	34	1	0	15	43	1843	5.26
29	0	0	18	0	0	11	46	1848	4.06
30	0	2	45	9	0	10	30	1804	5.32
31	0	1	64	87	0	4	34	1798	10.57
32	0	3	62	71	0	8	23	1921	8.69
33	0	5	62	23	0	10	22	1880	6.49
34	0	2	29	6	0	1	8	1160	3.97