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	1736	0.7
41	0	10	3	1	2034	0.7
42	0	15	11	10	2367	1.5
43	0	13	12	7	2587	1.2
44	0	16	10	16	2727	1.5
45	0	26	10	24	3017	2.0
46	0	41	29	20	3102	2.9
47	0	16	22	21	3082	1.9
48	0	61	39	32	3735	3.5
49	0	81	64	29	3443	5.1
50	1	95	103	40	4068	5.9
51	1	135	239	46	3967	10.6
52	0	233	451	94	5201	15.0
01	2	301	641	131	5731	18.8
02	2	196	551	117	5029	17.2
03	0	226	739	138	5005	22.0
04	0	255	760	188	5127	23.5
05	0	255	404	123	3446	22.7