INFLUENZA VIRUSES ISOLATED BY
WHO/NREVSS Collaborating Laboratories
2001 - 2002 Season
Week A(H1N1) & A(H1N2) A(H3N2) A(Unk) B Total # Tested % Positive
40 0 4 3 1 981 0.8
41 0 2 3 0 1279 0.4
42 0 3 4 0 1226 0.6
43 0 7 8 0 1398 1.1
44 1 6 6 0 1512 0.9
45 0 12 1 0 1658 0.8
46 0 36 7 1 1886 2.3
47 0 25 2 3 1800 1.7
48 0 50 20 1 2045 3.5
49 1 32 41 5 2048 3.9
50 2 33 67 2 2126 4.9
51 3 42 109 3 2556 6.1
52 0 44 163 1 2297 9.1
01 0 91 216 2 2980 10.4
02 1 108 310 6 3110 13.7
03 1 197 420 5 3443 18.1
04 3 253 596 10 4137 20.8
05 3 182 616 14 3856 21.1
06 0 157 200 6 2071 17.5

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