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	3193	1.03
41	0	0	9	0	2	8	3311	0.57
42	0	2	10	0	8	8	3430	0.82
43	0	0	12	0	19	12	3707	1.16
44	0	1	17	0	11	9	4034	0.94
45	0	2	15	0	17	15	4255	1.15
46	0	1	15	0	16	11	4499	0.96
47	0	3	23	0	29	20	4071	1.84
48	0	2	32	0	22	17	4645	1.57
49	0	5	38	0	43	20	4669	2.27
50	0	4	78	0	28	19	4855	2.66
51	0	7	105	0	57	24	4954	3.9
52	0	4	107	0	47	17	5319	3.29
01	0	16	101	0	38	22	5550	3.19
02	0	31	138	0	45	15	5273	4.34
03	0	49	195	0	50	17	5263	5.91
04	0	83	256	0	96	30	5771	8.06
05	0	123	365	0	127	41	5853	11.21
06	0	163	419	0	157	55	6095	13.03
07	0	219	506	0	252	68	6827	15.31
08	0	295	689	0	326	75	7100	19.51
09	0	437	964	0	386	104	7954	23.77
10	0	485	1154	0	445	107	7811	28.05
11	0	560	1333	0	466	183	8106	31.36
12	0	427	1032	0	391	224	7428	27.92
13	0	306	698	0	290	234	6932	22.04
14	0	263	615	0	272	260	6151	22.92
15	0	190	571	0	174	288	5826	20.99
16	0	119	539	0	173	310	5391	21.16
17	0	73	351	0	129	268	4577	17.94
18	0	54	299	0	96	236	4171	16.42
19	0	46	239	0	76	262	3803	16.38
20	0	33	166	0	56	250	3560	14.19
21	0	23	78	0	63	249	3465	11.92
22	0	14	93	0	46	223	2998	12.54
23	0	14	50	0	40	197	2961	10.17
24	0	12	55	0	52	171	2713	10.69
25	0	8	41	0	26	101	2327	7.56
26	0	3	22	0	22	120	2076	8.04
27	0	1	14	0	13	55	1656	5.01
28	0	2	29	0	15	37	1693	4.9
29	0	0	17	0	11	45	1711	4.27
30	0	1	41	0	9	24	1160	6.47
31	0	0	15	0	3	6	345	6.96