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        INFLUENZA VIRUSES ISOLATED BY
        WHO/NREVSS Collaborating Laboratories
        2008 - 2009 Season
        Week A(H1) A(H3) A(Unk) B Total # Tested % Positive
        40 2 0 9 7 2558 0.7
        41 4 4 6 6 2585 0.77
        42 13 3 15 6 2720 1.36
        43 22 0 24 14 3153 1.9
        44 11 1 21 5 3277 1.16
        45 28 3 23 10 3870 1.65
        46 27 2 19 10 3966 1.46
        47 25 0 36 22 4373 1.9
        48 37 2 46 21 4371 2.43
        49 33 4 60 14 4768 2.33
        50 61 4 69 35 5017 3.37
        51 48 8 70 31 4918 3.19
        52 47 6 89 31 4135 4.18
        53 10 5 55 9 2488 3.18

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