INFLUENZA VIRUSES ISOLATED BY
WHO/NREVSS Collaborating Laboratories
2009 - 2010 Season
Week A(H1) 2009 A H1N1 A(H3) A(unable to sub-type) A(Subtyping not performed) B Total # Tested % Positive
35 2 1884 13 16 1087 4 14443 20.81
36 1 2294 6 8 1462 11 16842 22.46
37 5 2617 3 10 1707 5 18726 23.21
38 4 2857 6 24 1723 18 19496 23.76
39 4 3847 7 24 1863 17 20564 28.02
40 1 6121 2 17 2043 19 24563 33.4
41 2 8627 0 17 2211 18 29034 37.46
42 2 9734 2 27 2342 30 31864 38.09
43 1 7738 2 38 2009 19 27990 35.04
44 3 6080 3 21 1462 30 24857 30.57
45 1 4625 1 22 1156 9 21714 26.78
46 1 2711 0 21 725 13 18194 19.08
47 1 1408 3 9 448 7 13199 14.21
48 1 997 0 11 316 9 12977 10.28
49 1 610 3 7 185 3 11195 7.23
50 0 480 3 6 172 6 10473 6.37
51 3 251 0 1 135 3 8437 4.66
52 0 285 1 1 134 8 9454 4.54
01 0 264 0 3 90 5 9364 3.87
02 1 261 2 2 115 11 8452 4.64
03 0 317 1 2 119 3 8373 5.28
04 0 267 3 0 110 6 8343 4.63
05 0 290 0 0 104 4 8262 4.82
06 0 238 0 0 108 7 7974 4.43
07 0 258 0 1 111 6 8184 4.59
08 0 316 1 0 100 3 7778 5.4
09 0 338 0 0 95 2 7255 6
10 0 338 0 0 85 11 6953 6.24
11 0 237 1 0 76 2 5871 5.38
12 0 153 1 0 44 4 5005 4.04
13 0 129 0 0 53 2 4274 4.31
14 0 33 1 0 18 0 1939 2.68

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