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INFLUENZA VIRUSES ISOLATED BY
WHO/NREVSS Collaborating Laboratories
2004 - 2005 Season

Week	A(H1N1) & A(H1N2)	A(H3N2)	A(Unk)	B	Total # Tested	% Positive
40	0	5	3	4	1707	0.7
41	0	10	3	1	2049	0.7
42	0	16	11	10	2402	1.5
43	0	13	12	7	2624	1.2
44	0	19	10	16	2762	1.6
45	0	28	10	24	3059	2.0
46	0	41	29	20	3145	2.9
47	0	18	22	21	3115	2.0
48	0	64	40	32	3833	3.5
49	0	88	72	32	3656	5.3
50	1	108	121	45	4324	6.4
51	1	179	278	54	4330	11.8
52	0	325	501	124	5732	16.6
01	2	400	686	154	6625	18.7
02	2	297	601	164	6320	16.8
03	2	373	852	198	6549	21.8
04	1	510	992	286	7553	23.7
05	0	683	1156	393	8104	27.5
06	2	637	1384	435	9067	27.1
07	1	687	1311	581	9822	26.3
08	1	482	1073	538	9007	23.2
09	0	225	923	482	7858	20.7
10	0	160	608	403	6975	16.8
11	0	141	473	444	6027	17.6
12	0	102	152	378	4633	13.6
13	3	49	154	324	4558	11.6
14	0	45	84	187	3311	9.5
15	0	13	34	103	2686	5.6
16	0	17	22	56	2351	4.0
17	0	10	11	35	1853	3.0
18	0	10	5	23	1315	2.9
19	0	8	1	11	1134	1.8
20	0	17	2	6	645	3.9