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        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 1 3 7 0 9 9 2501 1.16
        41 0 0 5 0 0 7 2227 0.54
        42 0 0 3 0 8 7 2213 0.81
        43 0 0 3 0 13 1 1798 0.95

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