What Is It?
Hepatitis is inflammation of the liver. There are several types of hepatitis. The disease has several causes.
One cause of hepatitis is infection. Most cases of infectious hepatitis in the United States are caused by hepatitis A, B or C virus.
An infection with one of these viruses might not cause any symptoms. Or it might cause only a mild, flu-like illness. Hepatitis A is usually a mild short-term illness. But hepatitis B and C often cause long-term (chronic) infections.