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

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Picornaviruses are viruses that belong to the family Picornaviridae. The name picornavirus means small RNA virus. Picornaviruses are non-enveloped, positive-stranded RNA viruses with an icosahedral capsid.

The family Picornaviridae includes rhinoviruses (which cause the common cold), poliovirus, and foot-and-mouth disease virus.

See also: virus classification