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 12 0 9 9 2967 1.11
41 0 0 6 0 5 8 3040 0.62
42 0 2 8 0 9 8 3194 0.85
43 0 0 11 0 19 12 3424 1.23
44 0 1 16 0 11 9 3707 1
45 0 2 13 0 18 15 3897 1.23
46 0 0 13 0 19 14 4143 1.11
47 0 1 19 0 30 19 3681 1.87
48 0 0 29 0 25 17 4181 1.7
49 0 5 34 0 32 17 4396 2
50 0 3 64 0 38 18 4589 2.68
51 0 6 92 0 65 23 4567 4.07
52 0 4 100 0 45 14 4678 3.48
01 0 12 90 0 44 15 4537 3.55
02 0 15 65 0 52 6 3771 3.66

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