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 2682 1.23
41 0 0 5 0 3 7 2630 0.57
42 0 1 5 0 9 7 2698 0.82
43 0 0 5 0 16 11 2917 1.1
44 0 0 6 0 7 11 2966 0.81
45 0 1 5 0 15 9 2145 1.4

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