ABSTRACT
Viral infections are important causes of liver disease worldwide. The five primary hepatitis viruses that have been identified are A, B, C, D (or delta), and E. Other viruses such as cytomegalovirus or Epstein-Barr virus also can result in hepatitis as part of a systemic infection. In addition, medications, toxins, autoimmune hepatitis, or Wilson’s disease may cause acute or chronic hepatitis.
