#viral_hepatitis__viralhepatiti  hepatitis caused by a virus
  supertype:  hepatitis__hepatiti  inflammation of the liver caused by a virus or a toxin
  subtype:  hepatitis_A__infectious_hepatitis  an acute but benign form of viral hepatitis caused by an RNA virus that does not persist in the blood serum and is usually transmitted by ingesting food or drink that is contaiminated with fecal matter
  subtype:  hepatitis_B__serum_hepatitis  an acute (sometimes fatal) form of viral hepatitis caused by a DNA virus that tends to persist in the blood serum and is transmitted by sexual contact or by transfusion or by ingestion of contaminated blood or other bodily fluids
  subtype:  hepatitis_C  a viral hepatitis clinically indistinguishable from hepatitis B but caused by a single-stranded RNA virus; usually transmitted by parenteral means (as injection of an illicit drug or blood transfusion or exposure to blood or blood products)

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