<unk>  is a disease caused by a small circular RNA virus<unk> elta virus or<unk>  virus,<unk> .<unk>  is considered to be a subviral satellite because it can propagate only in the presence of another virus, the<unk>  virus (HBV). Transmission of<unk>  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<unk>  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 greater likelihood of developing liver cancer in chronic infections. In combination with<unk>  virus,<unk>  has the highest mortality rate of all the<unk> nfections of 20%.
Hepatitis D
Hepatitis E
Hepatitis A
Hepatitis B
Hepatitis C
HIV AIDS
Hepatitis B vertical transmission
AIDS