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	34	2378	4.0
49	51	3	61	41	2665	5.9
50	55	1	103	52	3023	7.0
51	98	3	155	102	3167	11.3
52	108	0	190	124	3051	13.8
1	134	12	169	152	3376	13.8
2	194	10	284	245	3959	18.5
3	235	11	470	348	4729	22.5
4	272	12	510	474	5322	23.8
5	240	8	447	507	5492	21.9
6	174	5	284	539	5197	19.3
7	79	4	175	408	4483	14.9
8	47	4	116	380	4023	13.6
9	25	3	67	289	3699	10.4
10	10	0	38	164	3103	6.8
11	6	1	15	121	2687	5.3
12	1	2	14	97	2283	5.0
13	8	1	5	55	1677	4.1
14	0	0	1	24	717	3.5