Hepatitis D Virus and Infection
Hepatitis D, which is caused by the hepatitis D virus (HDV), is a disease that infects the liver. It's similar to the other hepatotropic viruses because it causes liver inflammation and produces similar symptoms, but HDV is unusual. It can only infect someone who has hepatitis B because it's a defective virus.
More About Hepatitis D
Hepatitis D is only seen in patients previously infected with hepatitis B. It is uncommon in the United States.