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	30	36	2392	4.1
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	145	9	168	156	3398	14.1
2	198	11	284	250	3978	18.7
3	247	9	470	359	4774	22.7
4	277	12	510	477	5346	23.9
5	248	8	442	508	5523	21.8
6	181	5	282	543	5280	19.1
7	97	5	175	431	4549	15.6
8	72	6	114	410	4137	14.6
9	41	7	68	343	3855	11.9
10	36	1	37	179	3228	7.8
11	24	2	17	143	2885	6.4
12	6	2	18	147	2577	6.7
13	15	1	8	89	2292	4.9
14	5	0	4	66	1838	4.1
15	0	1	5	37	1561	2.8
16	0	0	0	30	1326	2.3
17	0	0	0	3	1071	0.3
18	0	0	0	2	997	0.2
19	0	0	1	1	660	0.3
20	0	0	0	3	452	0.7