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Hepatitis D, also referred to as Hepatitis D virus (HDV) and classified as Hepatitis delta virus, is a disease caused by a small circular RNA virus. HDV is considered to be a subviral satellite because it can propagate only in the presence of the Hepatitis B virus (HBV). Transmission of HDV can occur either via simultaneous infection with HBV (coinfection) or via infection of an individual previously infected with HBV (superinfection).

Both superinfection and coinfection with HDV results in more severe complications compared to infection with HBV alone. These complications include a greater likelihood of experiencing liver failure in acute infections and a rapid progression to liver cirrhosis, with an increased chance of developing liver cancer in chronic infections. In combination with hepatitis B virus, hepatitis D has the highest mortality rate of all the hepatitis infections of 20%

Hepatitis D is one of the diseases which has become common in today’s world. Hepatitis D is considered to be one of those diseases which is caused due to the small circular RNA virus. This is also known as Hepatitis Delta virus, hepatitis D virus as well as HDV. The virus is also said to be a subviral satellite. This is so because, this can only propagate with the help of another virus. This is also said to be one of those virus infections which can occur by coinfection with HBV as well as by superinfecton. If there is only an infection on the part of HBV, then it is not much severe. But if you are infected with a coinfection or superinfection, then it may be severe. In case of coinfection and superinfection, there are chances that the people may be affected with acute liver failure as well. This can also result in liver cancer as well as chronic infection.