INFLUENZA VIRUSES ISOLATED BY
WHO/NREVSS Collaborating Laboratories
2008 - 2009 Season
Week A(H1) 2009 A H1N1 A(H3) A(Could Not Subtyped) A(Unk) B Total # Tested % Positive
40 3 0 0 0 8 6 2779 0.61
41 5 0 4 0 8 6 2891 0.8
42 13 0 3 0 15 6 2969 1.25
43 22 0 0 0 20 13 3437 1.6
44 13 0 3 0 21 6 3580 1.2
45 33 0 2 0 23 12 4188 1.67
46 25 0 2 0 23 12 4448 1.39
47 25 0 1 0 32 26 4783 1.76
48 40 0 1 0 48 20 4874 2.24
49 44 0 6 0 58 18 5654 2.23
50 69 0 9 0 69 42 6040 3.13
51 75 0 18 0 110 60 6325 4.16
52 68 0 12 0 157 45 6065 4.65
53 111 0 19 0 177 50 6613 5.4
01 163 0 27 0 300 78 6980 8.14
02 195 0 22 0 421 104 7024 10.56
03 353 0 46 0 666 189 7959 15.76
04 555 0 78 0 940 380 9496 20.57
05 671 0 52 0 1386 688 11750 23.8
06 823 0 66 0 1361 945 12716 25.13
07 840 0 70 1 1065 931 11801 24.63
08 700 0 57 0 1011 1147 11983 24.33
09 533 0 65 0 896 1158 11020 24.07
10 386 0 67 0 635 1062 9679 22.21
11 355 0 62 0 439 926 8726 20.42
12 269 0 45 0 293 636 7425 16.74
13 121 0 27 0 180 471 5835 13.69
14 102 0 37 1 130 283 5171 10.69
15 39 0 29 1 84 186 4713 7.19
16 41 14 33 4 77 113 4197 6.72
17 669 1300 851 193 489 787 35381 12.12
18 491 2392 709 126 713 490 33653 14.62
19 145 1697 259 88 626 134 16456 17.92
20 72 2600 260 73 777 93 15035 25.77
21 32 2810 258 30 962 42 12971 31.87
22 27 3628 425 18 873 26 13036 38.33
23 29 3903 261 19 1195 15 13284 40.82
24 15 4369 216 26 1288 9 13847 42.77
25 9 3128 72 38 998 7 11940 35.61
26 81 2359 38 30 748 7 10510 31.05
27 1 2574 41 16 616 7 10271 31.69
28 11 2069 28 18 511 4 9520 27.74
29 19 1831 15 25 406 3 8323 27.62
30 25 1852 11 27 497 4 8851 27.3
31 17 1273 7 25 489 3 7896 22.97
32 4 1250 8 15 436 5 7988 21.51
33 2 1578 16 22 484 1 9135 23.02
34 8 1356 12 27 728 14 10937 19.61
35 1 1366 12 33 1038 0 12476 19.64
36 1 1808 4 21 1419 7 14687 22.2
37 4 2075 1 27 1801 4 16031 24.4
38 5 1987 8 28 1884 12 15378 25.52
39 1 1549 1 40 1368 9 10816 27.44

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