INFLUENZA VIRUSES ISOLATED BY
WHO/NREVSS Collaborating Laboratories
2003 - 2004 Season
Week A(H1N1) & A(H1N2) A(H3N2) A(Unk) B Total # Tested % Positive
40 0 1 13 1 1051 1.4
41 0 3 41 0 1225 3.6
42 0 17 15 0 1147 2.8
43 0 54 235 1 1555 18.6
44 0 86 292 0 1777 21.3
45 0 195 423 3 2252 27.6
46 10 249 622 0 2788 31.6
47 0 136 934 6 3138 34.3

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