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Hepatitis Delta virus (HDV) is a small RNA virus (1.7kb) which only infects individuals with coexisting hepatitis B virus (HBV) infection. The HDV particle consists of an outer envelope of HBV origin and inner ribonucleoprotein complex made of a circular single-stranded RNA genome and Two HDV encoded delta antigens (HDAg).
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Ian Carter (1995) studied this question.
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