INFLUENZA VIRUSES ISOLATED BY
WHO/NREVSS Collaborating Laboratories
2004 - 2005 Season
Week A(H1N1) & A(H1N2) A(H3N2) A(Unk) B Total # Tested % Positive
40 0 5 3 4 1708 0.7
41 0 10 3 1 2019 0.7
42 0 15 11 9 2341 1.5
43 0 13 12 7 2504 1.3
44 0 15 8 16 2556 1.5
45 0 12 10 24 2830 1.6
46 0 32 26 20 2895 2.7
47 0 14 24 20 2892 2.0
48 0 56 38 31 3397 3.7
49 0 64 62 28 3136 4.9
50 1 71 90 36 3384 5.9
51 1 82 218 37 3145 10.7
52 0 116 386 49 3796 14.5
01 1 69 383 57 3040 16.8

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