INFLUENZA VIRUSES ISOLATED BY
WHO/NREVSS Collaborating Laboratories
2008 - 2009 Season
Week
A(H1)
A(H3)
A(Unk)
B
Total # Tested
% Positive
40
2
0
9
6
2449
0.69
41
4
4
6
5
2447
0.78
42
12
3
15
4
2505
1.36
43
22
2
20
14
2653
2.19
44
9
1
19
3
2666
1.2
45
8
2
24
8
3040
1.38
46
5
0
8
3
1772
0.9
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