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	3148	1.05
41	0	0	9	0	2	8	3269	0.58
42	0	2	10	0	8	8	3404	0.82
43	0	0	12	0	19	12	3651	1.18
44	0	1	17	0	11	9	3990	0.95
45	0	2	15	0	17	15	4196	1.17
46	0	1	15	0	16	14	4442	1.04
47	0	3	23	0	29	20	4007	1.87
48	0	2	32	0	22	17	4573	1.6
49	0	5	38	0	43	20	4600	2.3
50	0	4	78	0	28	19	4779	2.7
51	0	7	104	0	57	24	4853	3.96
52	0	4	105	0	47	17	5148	3.36
01	0	16	105	0	38	21	5342	3.37
02	0	30	139	0	45	16	5155	4.46
03	0	48	197	0	51	17	5142	6.09
04	0	80	255	0	96	30	5657	8.15
05	0	122	364	0	127	41	5693	11.49
06	0	161	419	0	156	54	5944	13.29
07	0	216	505	0	250	67	6682	15.53
08	0	294	686	0	329	73	6953	19.88
09	0	433	958	0	390	103	7787	24.19
10	0	483	1147	0	444	105	7691	28.33
11	0	557	1321	0	469	179	7986	31.63
12	0	425	1031	0	376	219	7291	28.13
13	0	306	694	0	286	231	6765	22.42
14	0	262	614	0	268	255	5990	23.36
15	0	187	567	0	174	281	5654	21.38
16	0	119	518	0	171	307	5209	21.41
17	0	72	350	0	126	265	4329	18.78
18	0	52	281	0	93	227	3876	16.85
19	0	43	230	0	74	245	3406	17.38
20	0	26	149	0	48	204	2841	15.03
21	0	15	33	0	44	138	1957	11.75