hepatitis D virus

The Hepatitis D virus (HDV), also known as the delta agent, is a single-stranded RNA virus that causes hepatitis D. It is unique because it requires the presence of the Hepatitis B virus (HBV) to replicate and cause infection, as it needs HBV to supply the proteins necessary for its outer coat.1

HDV infection can occur simultaneously with HBV infection or infect someone already living with HBV. When HDV infects someone already infected with HBV, it can lead to a more serious condition, potentially causing cirrhosis or chronic liver disease. Hepatitis D is transmitted through contact with infected blood or other bodily fluids. Preventing HBV infection is also the way to prevent HDV infection.23