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 2616 0.65
41 5 0 4 0 8 6 2669 0.86
42 13 0 3 0 15 6 2800 1.32
43 22 0 0 0 20 12 3250 1.66
44 13 0 3 0 21 6 3392 1.27
45 33 0 2 0 23 11 3992 1.73
46 25 0 2 0 23 12 4217 1.47
47 25 0 1 0 30 25 4611 1.76
48 40 0 1 0 47 20 4725 2.29
49 44 0 6 0 58 17 5442 2.3
50 69 0 9 0 66 41 5878 3.15
51 75 0 18 0 108 59 6145 4.23
52 68 0 12 0 154 43 5912 4.69
53 111 0 19 0 175 47 6383 5.51
01 162 0 27 0 289 77 6778 8.19
02 194 0 22 0 421 104 6908 10.73
03 353 0 45 0 624 187 7744 15.61
04 555 0 78 0 916 374 9293 20.69
05 669 0 52 0 1368 672 11574 23.86
06 817 0 66 0 1375 929 12782 24.93
07 836 0 68 1 1089 917 11825 24.62
08 688 0 57 0 1016 1127 11918 24.23
09 522 0 65 0 895 1106 10775 24.02
10 377 0 67 0 645 1026 9493 22.28
11 353 0 62 0 431 888 8459 20.5
12 262 0 44 0 285 610 7163 16.77
13 120 0 27 0 170 453 5641 13.65
14 100 0 37 1 129 268 4985 10.73
15 38 0 29 1 76 171 4431 7.11
16 41 14 33 4 77 106 3920 7.02
17 666 1291 851 193 422 722 33389 12.41
18 490 2387 709 125 566 447 31841 14.84
19 143 1694 259 87 445 126 15167 18.16
20 72 2594 260 73 646 88 14227 26.24
21 32 2801 258 30 687 38 12071 31.86
22 27 3619 425 18 580 24 12136 38.67
23 29 3888 261 19 807 14 12200 41.13
24 15 4340 216 26 1071 9 13003 43.66
25 9 3093 72 38 794 7 11115 36.1
26 81 2337 38 30 598 5 9524 32.43
27 1 2554 41 16 532 5 9533 33.03
28 11 2049 28 18 425 4 8657 29.28
29 19 1813 15 25 330 3 7626 28.91
30 25 1841 11 27 411 3 8168 28.38
31 17 1263 7 25 435 3 7300 23.97
32 4 1239 8 15 379 5 7440 22.18
33 2 1572 16 22 416 1 8546 23.74
34 8 1339 12 26 643 12 10121 20.16
35 1 1346 12 35 843 0 11422 19.59
36 1 1777 4 22 1082 7 13184 21.94
37 4 1951 1 33 1561 4 14453 24.59
38 3 1116 6 35 959 7 9314 22.83

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