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 41 5 57 14 5355 2.18
50 71 9 66 37 5788 3.16
51 73 18 107 56 6057 4.19
52 71 11 152 51 5828 4.89
53 113 17 168 48 6185 5.59
01 164 26 281 81 6623 8.33
02 194 20 419 95 6717 10.84
03 337 44 618 184 7463 15.85
04 537 71 894 345 8881 20.8
05 619 44 1351 642 11190 23.74
06 770 59 1300 875 12094 24.84
07 745 58 1031 844 11068 24.2
08 574 52 865 977 10678 23.11
09 301 29 731 861 8754 21.96
10 107 13 402 580 5076 21.71

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