Experts provide an update on HBV, HCV, and HEV infections in immunocompromised patients, focusing on viral reactivation after immunosuppressive treatment. Topics include: various types reactivation of viral hepatitis; at-risk patient populations; diagnostic criteria for reactivation of HBV, HCV, and HEV infection; preventive measures; effects of specific immunosuppressive therapies; and timing of antiviral treatment.