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

Week	A(H1)	A(2009 H1N1)	A(H3)	A(unable to sub-type)	A(Subtyping not performed)	B	Total # Tested	% Positive
40	0	3	14	0	7	9	3192	1.03
41	0	0	9	0	2	8	3311	0.57
42	0	2	10	0	8	8	3424	0.82
43	0	0	12	0	19	12	3705	1.16
44	0	1	17	0	11	9	4034	0.94
45	0	2	15	0	17	15	4252	1.15
46	0	1	15	0	16	11	4497	0.96
47	0	3	23	0	29	20	4069	1.84
48	0	2	32	0	22	17	4645	1.57
49	0	5	38	0	43	20	4667	2.27
50	0	4	78	0	28	19	4853	2.66
51	0	7	105	0	57	24	4952	3.9
52	0	4	107	0	47	17	5317	3.29
01	0	16	101	0	38	22	5547	3.19
02	0	31	138	0	45	15	5270	4.35
03	0	49	195	0	50	17	5259	5.91
04	0	83	256	0	96	30	5768	8.06
05	0	123	365	0	127	41	5853	11.21
06	0	163	419	0	157	55	6091	13.04
07	0	219	506	0	252	68	6825	15.31
08	0	295	689	0	326	75	7094	19.52
09	0	437	961	0	386	104	7939	23.78
10	0	485	1154	0	445	107	7815	28.04
11	0	560	1333	0	466	184	8120	31.32
12	0	427	1032	0	391	223	7438	27.87
13	0	306	698	0	290	234	6936	22.03
14	0	263	614	0	272	260	6158	22.88
15	0	190	571	0	175	287	5834	20.96
16	0	117	532	0	173	310	5393	20.99
17	0	73	351	0	129	268	4583	17.91
18	0	54	300	0	96	236	4177	16.42
19	0	46	239	0	76	262	3804	16.38
20	0	33	166	0	56	250	3562	14.18
21	0	23	78	0	63	249	3466	11.92
22	0	14	93	0	46	219	2992	12.43
23	0	14	50	0	40	195	2962	10.09
24	0	12	55	0	52	171	2700	10.74
25	0	8	41	0	26	101	2294	7.67
26	0	3	22	0	22	118	2054	8.03
27	0	1	8	0	19	50	1593	4.9
28	0	2	15	0	15	34	1500	4.4
29	0	0	5	0	9	24	1248	3.04