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 2558 0.66
41 4 4 6 6 2585 0.77
42 13 3 15 6 2716 1.36
43 22 0 24 14 3094 1.94
44 11 1 21 4 3269 1.13
45 28 3 23 10 3862 1.66
46 27 2 18 10 3739 1.52
47 24 0 36 22 4130 1.99
48 37 2 45 20 4060 2.56
49 33 3 59 13 4431 2.44
50 56 4 68 32 4565 3.5
51 26 7 63 25 3770 3.21
52 18 4 83 25 2610 4.98

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