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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	1736	0.7
41	0	10	3	1	2034	0.7
42	0	15	11	10	2363	1.5
43	0	13	12	7	2583	1.2
44	0	15	10	16	2725	1.5
45	0	12	10	24	3002	1.5
46	0	32	29	20	3091	2.6
47	0	16	22	20	3080	1.9
48	0	61	39	32	3719	3.5
49	0	80	64	29	3417	5.1
50	1	94	102	39	4052	5.8
51	1	132	240	45	3938	10.6
52	0	174	475	87	5072	14.5
01	2	182	662	107	5519	17.3
02	1	163	535	102	4741	16.9
03	0	184	607	104	4256	21.0
04	0	92	297	85	2986	15.9