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 2612 0.65
41 5 0 4 0 8 6 2666 0.86
42 13 0 3 0 15 6 2798 1.32
43 22 0 0 0 24 14 3261 1.84
44 13 0 3 0 21 6 3392 1.27
45 33 0 2 0 23 11 3989 1.73
46 25 0 2 0 23 12 4217 1.47
47 25 0 1 0 30 25 4608 1.76
48 40 0 1 0 47 20 4726 2.29
49 44 0 6 0 58 17 5448 2.29
50 70 0 9 0 66 41 5887 3.16
51 76 0 19 0 109 59 6156 4.27
52 69 0 12 0 154 43 5923 4.69
53 116 0 19 0 175 47 6405 5.57
01 166 0 27 0 289 78 6805 8.23
02 198 0 22 0 425 104 6948 10.78
03 355 0 45 0 629 187 7766 15.66
04 558 0 78 0 898 367 9153 20.77
05 673 0 52 0 1369 673 11595 23.86
06 827 0 66 0 1375 930 12813 24.96
07 843 0 69 1 1080 916 11732 24.8
08 693 0 58 0 1016 1132 11935 24.29
09 539 0 68 0 889 1117 10689 24.45
10 382 0 68 0 643 1030 9438 22.49
11 356 0 63 0 429 889 8420 20.63
12 263 0 44 0 285 614 7175 16.81
13 118 0 27 0 171 456 5653 13.66
14 98 0 37 1 128 268 4986 10.67
15 38 0 29 1 76 171 4438 7.1
16 44 12 33 3 80 105 3935 7.04
17 654 1275 780 203 417 702 33002 12.21
18 474 2330 582 135 567 438 30736 14.73
19 139 1680 231 91 439 125 14969 18.07
20 69 2547 239 86 641 84 14040 26.11
21 32 2742 236 45 669 38 11875 31.68
22 25 3540 410 18 577 24 11999 38.29
23 29 3813 251 18 802 14 11991 41.09
24 15 4216 211 24 1061 9 12770 43.35
25 9 2991 69 33 777 7 10874 35.74
26 12 2113 37 26 592 5 9079 30.68
27 2 2364 33 13 526 5 9066 32.46
28 3 1849 23 17 417 3 8221 28.12
29 4 1578 14 24 283 3 6996 27.24
30 3 1598 11 22 324 1 7200 27.21
31 10 1052 6 19 418 3 6483 23.26
32 14 869 5 12 253 5 6027 19.21
33 2 788 10 20 380 1 6473 18.55
34 10 755 11 18 311 4 6410 17.3

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