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	3144	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	178	279	54	4330	11.8
52	0	325	501	123	5729	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	681	1158	393	8104	27.5
06	2	637	1384	435	9067	27.1
07	1	563	1314	525	9814	24.5
08	1	480	1073	532	9007	23.2
09	0	225	923	475	7857	20.7
10	0	156	609	380	6974	16.4
11	0	140	474	428	6027	17.3
12	0	102	152	368	4632	13.4
13	3	49	154	298	4557	11.1
14	0	26	86	168	3310	8.5
15	0	11	34	96	2658	5.3
16	0	17	19	55	2325	3.9
17	0	10	11	32	1680	3.2
18	0	10	5	22	1199	3.1
19	0	8	1	7	771	2.1