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	1752	0.7
41	0	10	3	1	2049	0.7
42	0	16	11	10	2401	1.5
43	0	13	12	7	2624	1.2
44	0	19	10	16	2774	1.6
45	0	28	10	24	3059	2.0
46	0	41	29	20	3145	2.9
47	0	18	22	21	3114	2.0
48	0	64	40	32	3832	3.5
49	0	88	64	32	3533	5.2
50	1	107	107	45	4208	6.2
51	1	178	241	54	4130	11.5
52	0	324	437	124	5411	16.4
01	2	398	659	154	6201	19.6
02	2	296	585	161	5939	17.6
03	2	370	828	198	6294	22.2
04	1	490	996	282	7338	24.1
05	0	658	1157	384	7904	27.8
06	2	613	1365	429	8871	27.2
07	1	541	1313	519	9528	24.9
08	1	434	1075	509	8623	23.4
09	0	202	918	435	7303	21.3
10	0	143	590	341	6268	17.1
11	0	101	449	371	5087	18.1
12	0	51	79	180	2588	12.0
13	0	12	114	113	2143	11.2