INFLUENZA VIRUSES ISOLATED BY
WHO/NREVSS Collaborating Laboratories
2000 - 2001 Season

Week	A(H1N1)	A(H3N2)	A(Unk)	B	Total # Tested	% Positive
40	0	0	0	1	1204	0.1
41	2	0	2	0	1272	0.3
42	1	0	1	2	1456	0.3
43	7	3	1	2	1287	1.0
44	10	1	3	3	1721	1.0
45	24	1	4	3	1487	2.2
46	17	1	11	12	1967	2.1
47	20	2	30	23	2073	3.6
48	30	1	28	36	2392	4.0
49	51	3	61	41	2665	5.9
50	55	1	103	53	3036	7.0
51	102	3	155	103	3177	11.4
52	117	0	190	127	3070	14.1
1	142	12	168	156	3398	14.1
2	198	11	284	250	3978	18.7
3	243	11	470	358	4771	22.7
4	276	12	510	477	5345	23.9
5	243	8	446	508	5522	21.8
6	176	5	284	542	5249	19.2
7	94	5	176	431	4530	15.6
8	66	6	119	409	4124	14.5
9	38	7	72	340	3839	11.9
10	33	1	40	179	3214	7.9
11	24	2	17	142	2870	6.4
12	6	2	18	139	2537	6.5
13	8	1	5	60	2264	3.3
14	2	0	2	38	1734	2.4
15	0	1	4	26	1449	2.1
16	0	0	0	28	1002	2.8
17	0	0	0	3	609	0.5
18	0	0	0	0	347	0.0