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	1563	0.0
41	1	0	1	1	1654	0.2
42	0	0	0	0	1737	0.0
43	3	0	1	1	1949	0.3
44	0	0	3	3	1795	0.3
45	0	2	0	3	2138	0.2
46	0	0	6	4	2316	0.4
47	2	0	5	16	2297	1.0
48	1	2	5	6	2086	0.7
49	4	3	6	28	2643	1.6
50	8	2	15	74	2731	3.6
51	17	3	25	143	3174	5.9
52	17	6	21	151	2832	6.9
01	37	8	35	111	3324	5.7
02	59	18	46	188	3528	8.8
03	88	11	88	272	3793	12.1
04	115	24	150	383	4110	16.4
05	200	47	242	534	5043	20.3
06	298	71	361	704	5731	25.0
07	273	108	352	580	5465	24.0
08	288	126	308	411	5289	21.4
09	301	99	279	376	4925	21.4
10	235	83	236	237	4101	19.3
11	165	59	229	183	3814	16.7
12	197	67	198	125	3914	15.0
13	120	28	111	71	3111	10.6
14	59	23	92	38	2408	8.8
15	22	20	53	16	2165	5.1
16	6	12	22	17	1457	3.9
17	3	13	27	8	1342	3.8
18	11	4	19	15	1162	4.2
19	4	6	6	3	858	2.2
20	0	2	1	1	511	0.8