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 6 2557 0.66
41 4 4 6 6 2585 0.77
42 13 3 15 6 2713 1.36
43 22 0 24 14 3092 1.94
44 11 1 21 4 3267 1.13
45 28 3 23 10 3860 1.66
46 27 2 18 10 3723 1.53
47 24 0 36 22 4017 2.04
48 37 2 45 20 4037 2.58
49 33 3 58 13 4419 2.42
50 55 4 67 32 4489 3.52
51 22 3 55 23 3035 3.39

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