Viral Hepatitis: A through E and Beyond
What is viral hepatitis?
Viral hepatitis is inflammation of the liver caused by a virus. Several different viruses, named the hepatitis A, B, C, D, and E viruses, cause viral hepatitis.
All of these viruses cause acute, or short-term, viral hepatitis. The hepatitis B, C, and D viruses can also cause chronic hepatitis, in which the infection is prolonged, sometimes lifelong. Chronic hepatitis can lead to cirrhosis, liver failure, and liver cancer.
Researchers are looking for other viruses that may cause hepatitis, but none have been identified with certainty. Other viruses that less often affect the liver include cytomegalovirus; Epstein-Barr virus, also called infectious mononucleosis; herpesvirus; parvovirus; and adenovirus.
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