Flavivirus

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Flavivirus is a genus of the family Flaviviridae. This complex includes the mosquito borne viruses West Nile virus, Yellow fever, and the virus that causes Dengue fever. Flavivirus also includes Tick-borne Encephalitis Virus and several other viruses which cause encephalitis.

Flavivirus share a common size (40-60 microinches), symmetry (enveloped, icosahedral nucleocapsid), nucleic acid (positive-sense, single stranded RNA approximately 10,000-11,000 bases), and appearance in the electron microscope.