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 12 152 51 5829 4.91
53 113 19 170 48 6312 5.54
01 165 26 279 82 6695 8.24
02 196 22 421 96 6787 10.83
03 340 44 620 186 7596 15.67
04 556 76 894 359 9009 20.92
05 674 52 1359 671 11461 24.05
06 811 63 1337 910 12471 25.03
07 813 65 1065 893 11470 24.73
08 664 58 993 1094 11675 24.06
09 491 54 876 1077 10358 24.12
10 311 54 613 959 8905 21.75
11 273 58 414 803 7871 19.67
12 186 32 259 529 6083 16.54
13 83 18 146 334 4063 14.3
14 39 11 87 122 2873 9.01

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