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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	1752	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	2774	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	3832	3.5
49	0	88	64	32	3533	5.2
50	1	108	107	45	4209	6.2
51	1	178	242	54	4131	11.5
52	0	325	437	124	5416	16.4
01	2	400	659	154	6206	19.6
02	2	296	588	162	5944	17.6
03	2	371	830	198	6300	22.2
04	1	508	984	284	7345	24.2
05	0	678	1142	384	7910	27.9
06	2	626	1361	430	8891	27.2
07	1	571	1297	524	9647	24.8
08	1	476	1065	519	8850	23.3
09	0	222	913	455	7684	20.7
10	0	153	603	366	6836	16.4
11	0	140	467	413	5907	17.3
12	0	91	149	340	4443	13.1
13	3	46	152	281	4351	11.1
14	0	19	89	147	3086	8.3
15	0	9	18	79	2118	5.0
16	0	10	17	37	1947	3.3
17	0	9	9	24	1176	3.6