INFLUENZA VIRUSES ISOLATED BY
WHO/NREVSS Collaborating Laboratories
2011 - 2012 Season
Week A(H1) A(2009 H1N1) A(H3) A(unable to sub-type) A(Subtyping not performed) B Total # Tested % Positive
40 0 3 14 0 7 9 2992 1.1
41 0 0 9 0 2 8 3061 0.62
42 0 2 9 0 8 8 3212 0.84
43 0 0 12 0 19 12 3458 1.24
44 0 1 17 0 11 9 3794 1
45 0 2 14 0 17 15 3983 1.21
46 0 1 14 0 16 14 4221 1.07
47 0 2 21 0 28 19 3760 1.86
48 0 1 33 0 21 17 4267 1.69
49 0 5 38 0 29 17 4496 1.98
50 0 3 77 0 29 19 4669 2.74
51 0 7 104 0 54 23 4689 4.01
52 0 4 104 0 43 16 4989 3.35
01 0 16 105 0 37 19 5229 3.38
02 0 30 139 0 43 17 5103 4.49
03 0 45 196 0 50 17 5058 6.09
04 0 74 253 0 98 28 5565 8.14
05 0 121 364 0 123 40 5542 11.69
06 0 155 417 0 159 53 5849 13.4
07 0 208 498 0 245 66 6516 15.61
08 0 290 682 0 324 70 6876 19.87
09 0 422 945 0 383 102 7601 24.37
10 0 432 1113 0 432 98 7287 28.48
11 0 519 1281 0 452 177 7584 32.03
12 0 376 931 0 340 203 6574 28.14
13 0 291 569 0 263 195 5617 23.46
14 0 133 267 0 207 149 3607 20.96

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