text: <unk>  is an irreversible change to the liver, and ongoing research hopes to determine the mechanism of scar formation and how to interrupt or reverse this process. Newer<unk>  are being developed against viral causes of liver diseases. New vaccines are currently under development for Hepatitis C, and have already been developed for hepatitis B.
option_0: Cirrhosis future or investigational therapies
option_1: Acute liver failure future or investigational therapies
option_2: Cirrhosis primary prevention
option_3: Cirrhosis tertiary prevention
option_4: Hepatopulmonary syndrome future or investigational therapies
option_5: Cirrhosis cost-effectiveness of therapy
option_6: Cirrhosis secondary prevention
option_7: Acute liver failure primary prevention