INFLUENZA VIRUSES ISOLATED BY
WHO/NREVSS Collaborating Laboratories
2001 - 2002 Season
Week A(H1N1) A(H3N2) A(Unk) B Total # Tested % Positive
40 0 4 3 1 995 0.8
41 0 2 3 0 1131 0.4
42 0 3 4 0 1041 0.7
43 0 6 7 0 1075 1.2
44 1 6 5 0 1087 1.1
45 0 8 0 0 1026 0.8
46 0 13 4 1 1068 1.7
47 0 2 0 1 717 0.4

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