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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	5855	11.2
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	961	0	386	104	7944	23.77
10	0	485	1154	0	445	107	7805	28.07
11	0	560	1333	0	466	183	8107	31.36
12	0	427	1032	0	391	224	7428	27.92
13	0	306	698	0	290	234	6931	22.05
14	0	263	615	0	272	260	6152	22.92
15	0	190	570	0	175	287	5825	20.98
16	0	117	532	0	173	310	5382	21.03
17	0	73	351	0	129	268	4576	17.94
18	0	54	299	0	96	236	4170	16.43
19	0	46	238	0	76	262	3802	16.36
20	0	33	166	0	56	250	3557	14.2
21	0	23	78	0	63	249	3464	11.92
22	0	14	93	0	46	219	2989	12.45
23	0	14	50	0	40	195	2914	10.26
24	0	12	55	0	52	170	2685	10.76
25	0	8	41	0	26	101	2217	7.94
26	0	3	22	0	22	117	1955	8.39
27	0	0	8	0	18	50	1396	5.44
28	0	1	4	0	16	31	974	5.34