“…Although a moderate rise in liver enzyme levels is common in VZV infection, hepatitis is a rare life-threatening complication that, like others, mainly affects immunocompromised patients. 2,3,7 As well as by VZV, hepatitis can be caused by herpes simplex virus, Epstein-Barr virus, cytomegalovirus, and human herpesvirus 6, 1 as well as by adenoviruses, hemorrhagic fever viruses and, of course, the viruses of hepatitides A through E. Herpes viral origin must be considered in the case of immunocompromised patients with fever, to whom, pending the exclusion of such origin, parenteral acyclovir should be given in view of the risk of fastdeveloping FHF. In Spain, however, the most common cause of FHF is hepatitis B virus.…”