Hepatitis A is an infection of the liver. It is caused by a virus. The virus is found by doing a blood test.
Some cases are quite mild, especially in children.
Adults are usually sicker. Symptoms begin 2-6 weeks after a perons is exposed to the virus. Some persons have no symptoms at all. A sick person is contagious to others from two weeks before illness, to two weeks after. Drinking water with infected stool in it.