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 2789 1.18
41 0 0 5 0 5 8 2836 0.63
42 0 2 8 0 9 8 3013 0.9
43 0 0 10 0 19 12 3283 1.25
44 0 1 16 0 11 9 3504 1.06
45 0 2 11 0 18 15 3596 1.28
46 0 2 14 0 18 16 3789 1.32
47 0 3 19 0 30 20 3117 2.31
48 0 0 12 0 24 1 2233 1.66

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