Hepatitis D virus (HDV) is a ribonucleic acid (RNA) virus that requires hepatitis B virus (HBV) for its replication. HDV infection occurs only simultaneously or as super-infection with HBV.
The virus is transmitted through contact with the blood or other body fluids of an infected person.
Vertical transmission from mother to child is rare.
Approximately 15 million people across the world are chronically coinfected with HDV and HBV 1.
Currently there is no effective antiviral treatment for hepatitis D.
Hepatitis D infection can be prevented by hepatitis B immunization.