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INFLUENZA VIRUSES ISOLATED BY
WHO/NREVSS Collaborating Laboratories
2002 - 2003 Season
Week A(H1N1) & A(H1N2) A(H3N2) A(Unk) B Total # Tested % Positive
40 0 0 0 0 1451 0.0
41 1 0 1 1 1567 0.2
42 0 0 0 0 1622 0.0
43 3 0 1 1 1803 0.3
44 0 0 2 3 1642 0.3
45 0 2 0 3 2012 0.2
46 0 0 6 4 2113 0.5
47 2 0 5 16 2117 1.1
48 1 1 5 6 1903 0.7
49 4 3 4 30 2420 1.7
50 7 1 14 74 2480 3.9
51 17 0 23 143 2947 6.2
52 16 6 17 145 2597 7.1
01 27 8 28 110 2896 6.0
02 49 17 41 180 3071 9.3
03 62 9 84 267 3275 12.9
04 76 19 138 351 3379 17.3
05 133 38 188 466 4031 20.5
06 212 29 331 630 4812 25.0
07 169 34 283 485 4403 22.1
08 138 47 231 307 3685 19.6
09 123 20 143 225 2597 19.7
10 49 6 42 70 908 18.4

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