INFLUENZA VIRUSES ISOLATED BY
WHO/NREVSS Collaborating Laboratories
2001 - 2002 Season

Week	A(H1N1) & A(H1N2)	A(H3N2)	A(Unk)	B	Total # Tested	% Positive
40	0	4	3	1	984	0.8
41	0	2	3	0	1284	0.4
42	0	3	4	0	1232	0.6
43	0	7	8	0	1396	1.1
44	1	6	6	0	1512	0.9
45	0	12	1	0	1655	0.8
46	0	36	7	1	1888	2.3
47	0	25	2	3	1806	1.7
48	0	50	20	1	2057	3.5
49	1	32	41	5	2058	3.8
50	2	33	68	2	2130	4.9
51	3	42	109	3	2556	6.1
52	0	45	163	1	2308	9.1
01	0	95	219	2	3132	10.1
02	2	120	367	6	3342	14.8
03	1	228	599	5	4022	20.7
04	8	320	751	11	5015	21.7
05	3	355	907	20	5224	24.6
06	3	432	920	15	5755	23.8
07	2	366	985	21	5856	23.5
08	7	258	1004	48	5169	25.5
09	1	160	585	51	3208	24.8
10	1	117	310	20	1905	23.5