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 2970 1.11
41 0 0 6 0 5 8 3033 0.63
42 0 2 8 0 9 8 3201 0.84
43 0 0 11 0 19 12 3427 1.23
44 0 1 16 0 11 9 3698 1
45 0 2 12 0 18 15 3894 1.21
46 0 0 13 0 19 14 4146 1.11
47 0 1 19 0 30 19 3628 1.9
48 0 0 27 0 25 17 4145 1.66
49 0 4 32 0 32 17 4273 1.99
50 0 3 54 0 39 16 4168 2.69
51 0 4 76 0 66 22 3939 4.27
52 0 0 45 0 40 10 3310 2.87

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