Hepatitis E Virus
Hepatitis E virus is an infective organism.
The viral particles are 27 to 34 nanometers in diameter. They are non-enveloped and contain a single-strand of positive-sense RNA which is approximately 7300 bases in length. The virus was first visualized in 1983 and molecularly cloned in 1990.
Previously it was classified in the family Caliciviridae. Its genome more closely resembles the rubella virus and is now classified as the only member of the genus Hepevirus which has not yet been assigned to a family.