INFLUENZA VIRUSES ISOLATED BY
WHO/NREVSS Collaborating Laboratories
2008 - 2009 Season
Week A(H1) A(H3) A(Unk) B Total # Tested % Positive
40 3 0 8 6 2610 0.65
41 4 4 8 6 2643 0.83
42 13 3 15 6 2741 1.35
43 22 0 24 14 3177 1.89
44 11 2 22 5 3313 1.21
45 30 2 23 11 3902 1.69
46 25 2 23 12 4126 1.5
47 27 1 31 23 4471 1.83
48 40 1 47 24 4568 2.45
49 40 4 58 14 5240 2.21
50 71 9 66 36 5603 3.25
51 72 17 106 56 5883 4.27
52 69 10 149 50 5622 4.94
53 103 17 168 45 5885 5.66
01 143 25 236 68 6147 7.68
02 151 19 366 80 5628 10.95
03 189 35 500 130 5901 14.47
04 243 31 669 184 6520 17.29
05 146 14 741 253 5596 20.62

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