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 10 9 2784 1.22
41 0 0 5 0 3 8 2814 0.57
42 0 2 8 0 9 8 2992 0.9
43 0 0 10 0 17 11 3179 1.2
44 0 0 11 0 8 11 3241 0.93
45 0 1 10 0 15 13 3147 1.24
46 0 0 5 0 13 4 2276 0.97

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