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	3194	1.03
41	0	0	9	0	2	8	3312	0.57
42	0	2	10	0	8	8	3433	0.82
43	0	0	12	0	19	12	3706	1.16
44	0	1	17	0	11	9	4037	0.94
45	0	2	15	0	17	15	4254	1.15
46	0	1	15	0	16	11	4503	0.95
47	0	3	23	0	29	20	4072	1.84
48	0	2	32	0	22	17	4645	1.57
49	0	5	38	0	43	20	4670	2.27
50	0	4	79	0	28	19	4857	2.68
51	0	7	105	0	57	24	4955	3.9
52	0	4	107	0	47	17	5321	3.29
01	0	16	101	0	38	22	5546	3.19
02	0	31	138	0	45	15	5272	4.34
03	0	49	197	0	50	17	5266	5.94
04	0	83	256	0	96	29	5772	8.04
05	0	123	365	0	127	41	5857	11.2
06	0	163	420	0	157	55	6099	13.03
07	0	219	506	0	252	67	6824	15.3
08	0	295	691	0	326	75	7108	19.51
09	0	437	963	0	386	104	7949	23.78
10	0	485	1156	0	445	107	7810	28.08
11	0	560	1338	0	466	183	8112	31.4
12	0	427	1039	0	391	224	7435	27.99
13	0	306	700	0	290	234	6937	22.06
14	0	263	619	0	272	260	6159	22.96
15	0	190	571	0	175	287	5830	20.98
16	0	117	531	0	173	309	5381	21
17	0	73	351	0	129	268	4577	17.94
18	0	54	301	0	96	235	4171	16.45
19	0	46	239	0	76	262	3807	16.36
20	0	33	165	0	56	250	3553	14.19
21	0	23	75	0	62	244	3360	12.02
22	0	14	93	0	45	216	2894	12.72
23	0	15	47	0	39	189	2847	10.19
24	0	10	53	0	49	160	2587	10.51
25	0	8	36	0	23	91	2062	7.66
26	0	3	10	0	22	89	1449	8.56