Definition of hepatitis A
: an acute usually benign hepatitis that is caused by a picornavirus (species Hepatitis A virus of the genus Hepatovirus), is marked by fatigue, fever, nausea, vomiting, abdominal pain, darkened urine, and jaundice but may be asymptomatic, especially in children, and is transmitted especially in food and water contaminated with infected fecal matter
Note:
Unlike other forms of hepatitis, hepatitis A is a short-term illness that does not progress to a chronic condition and does not typically cause permanent liver damage.
— called also
infectious hepatitis 
