Hepatitis A is an infectious disease of the liver caused by the hepatitis A virus (HAV). Many instances have few or no signs, in particular in the young. The time between contamination and symptoms, in individuals who increase them, is between two and 6 weeks. When signs and symptoms occur, they generally final eight weeks and may consist of Fatigue, Sudden nausea and vomiting, Abdominal pain or discomfort, mainly on the upper right side under your lower ribs (by your liver), Clay-colored bowel movements, Loss of appetite, Low-grade fever, Dark urine, Joint pain.