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INFLUENZA VIRUSES ISOLATED BY
WHO/NREVSS Collaborating Laboratories
2002 - 2003 Season

Week	A(H1N1) & A(H1N2)	A(H3N2)	A(Unk)	B	Total # Tested	% Positive
40	0	0	0	0	1451	0.0
41	1	0	1	1	1567	0.2
42	0	0	0	0	1622	0.0
43	3	0	1	1	1803	0.3
44	0	0	2	3	1642	0.3
45	0	2	0	3	2012	0.2
46	0	0	6	4	2113	0.5
47	2	0	5	16	2117	1.1
48	1	1	5	6	1903	0.7
49	4	3	4	30	2419	1.7
50	7	1	14	74	2480	3.9
51	17	0	23	143	2947	6.2
52	16	6	17	145	2602	7.1
01	27	8	28	111	2924	6.0
02	49	17	41	182	3113	9.3
03	63	9	83	268	3337	12.7
04	79	19	139	367	3504	17.2
05	138	39	191	477	4163	20.3
06	215	31	357	660	5053	25.0
07	178	39	354	559	4910	23.0
08	169	55	321	397	4613	20.4
09	150	21	253	309	4032	18.2
10	69	13	192	158	2840	15.2
11	55	3	111	52	1528	14.5