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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	3015	1.09
41	0	0	9	0	2	8	3108	0.61
42	0	2	9	0	8	8	3249	0.83
43	0	0	12	0	19	12	3495	1.23
44	0	1	17	0	11	9	3836	0.99
45	0	2	14	0	17	15	4037	1.19
46	0	1	14	0	16	14	4246	1.06
47	0	2	22	0	29	19	3797	1.9
48	0	1	32	0	21	17	4314	1.65
49	0	5	38	0	31	17	4538	2.01
50	0	3	79	0	29	19	4731	2.75
51	0	7	104	0	54	23	4784	3.93
52	0	4	105	0	43	16	5093	3.3
01	0	16	104	0	38	21	5298	3.38
02	0	30	139	0	44	16	5111	4.48
03	0	47	198	0	50	17	5090	6.13
04	0	78	253	0	97	28	5568	8.19
05	0	121	363	0	126	41	5659	11.5
06	0	157	420	0	160	54	5912	13.38
07	0	215	458	0	243	64	6540	14.98
08	0	287	652	0	325	73	6831	19.57
09	0	430	955	0	387	102	7735	24.23
10	0	474	1139	0	440	105	7624	28.31
11	0	545	1309	0	468	175	7905	31.59
12	0	418	1022	0	365	218	7163	28.24
13	0	323	696	0	283	229	6692	22.88
14	0	271	598	0	262	252	5782	23.92
15	0	182	529	0	157	272	5216	21.86
16	0	108	410	0	138	276	4367	21.34
17	0	34	177	0	89	142	2886	15.32