The first symptoms to appear are similar to those of influenza and include slight fever, fatigue, weakness, loss of appetite, headache, nausea, vomiting and abdominal pain. The remainder are said to have anicteric hepatitis. Jaundice is characterized by a yellowish coloration of the skin and the whites of the eyes, dark urine and pale stools. Typically, it lasts for about 2 weeks. In a few cases, the acute disease develops into fulminant hepatitis, a severe condition in which there is a sudden onset of high fever, abdominal pain, vomiting and jaundice.
Fulminant hepatitis is often fatal.