A woman with a history of intravenous heroin use and chronic inactive hepatitis B virus infection had sudden onset of painless jaundice and malaise. Vital signs, mentation, and physical examination were normal except for scleral icterus; she reported no history of travel outside the US and no raw meat ingestion; aminotransferase and bilirubin levels were newly elevated, but she had no acute hepatitis A or C virus infection. What is the diagnosis and what would you do next?
Source: JAMA Online First