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	139	0	0	45	15	5284	4.35
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	366	0	0	128	41	5858	11.25
06	0	164	421	0	0	157	55	6098	13.07
07	0	220	508	0	0	254	68	6835	15.36
08	0	295	690	0	0	326	75	7101	19.52
09	0	437	965	0	0	388	104	7954	23.81
10	0	485	1154	0	0	445	107	7811	28.05
11	0	561	1332	0	0	466	184	8112	31.35
12	0	427	1033	0	0	391	223	7427	27.93
13	0	306	699	0	0	290	234	6935	22.05
14	0	262	619	0	0	272	260	6157	22.95
15	0	187	572	0	0	177	288	5831	20.99
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	229	0	0	76	261	3750	16.13
20	0	34	164	0	0	56	251	3534	14.29
21	0	17	85	0	0	63	250	3437	12.07
22	0	15	84	0	0	46	223	2991	12.3
23	0	14	47	0	0	40	200	2963	10.16
24	0	9	62	0	0	52	178	2709	11.11
25	0	3	35	0	0	26	104	2321	7.24
26	0	3	26	0	0	22	117	2106	7.98
27	0	5	16	0	0	13	56	1738	5.18
28	0	3	32	1	0	15	41	1776	5.18
29	0	0	17	0	0	11	46	1810	4.09
30	0	2	45	9	0	10	27	1629	5.71
31	0	1	62	87	0	4	34	1651	11.39
32	0	3	40	69	0	8	22	1644	8.64
33	0	3	29	22	0	11	17	1410	5.82