The Flaviviridae reference article from the English Wikipedia on 24-Apr-2004
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Flaviviridae

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Flaviviridae is a family of viruses that infect mammals. The taxon includes the flavivirus (yellow fever, West Nile virus), pestivirus (classical swine fever or hog cholera), and Hepatitis C-like viruses (Hepatitis C) groups.

The genome of the Flaviviridae viruses is a monopartite, linear, single-stranded RNA of positive sense that is 10,000-11,000 nucleotides long. The 5'-terminus carries a methylated nucleotide cap or a genome-linked protein. The virus itself is enveloped and spherical, about 40-60 nm in diameter.

See also: Virus classification