INFLUENZA VIRUSES ISOLATED BY
WHO/NREVSS Collaborating Laboratories
2008 - 2009 Season
Week A(H1) A(H3) A(Unk) B Total # Tested % Positive
40 3 0 8 6 2598 0.65
41 4 4 8 6 2632 0.84
42 13 3 15 6 2746 1.35
43 22 0 24 14 3198 1.88
44 12 3 21 5 3320 1.23
45 32 2 23 11 3920 1.73
46 25 2 23 12 4145 1.5
47 27 1 31 23 4540 1.81
48 40 1 46 24 4636 2.39
49 43 5 57 14 5355 2.22
50 71 9 66 37 5788 3.16
51 73 19 108 56 6057 4.23
52 71 12 153 51 5829 4.92
53 113 19 171 48 6237 5.63
01 165 26 281 82 6695 8.27
02 196 22 419 96 6785 10.8
03 340 44 620 186 7596 15.67
04 556 76 896 359 9009 20.95
05 674 52 1358 670 11460 24.03
06 812 63 1336 910 12471 25.03
07 812 64 1065 892 11464 24.71
08 660 57 914 1037 11150 23.93
09 488 52 817 1031 9912 24.09
10 296 52 595 930 8582 21.82
11 235 40 398 757 7214 19.82
12 130 18 180 394 4300 16.79

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