Hepatitis A is a virus that affects the functioning of the liver. This virus enters the body due to the intake of contaminated food and water or contact with an infected person. The after-effects of the hepatitis A virus range from mild fever to severe consequences such as nausea, indigestion, dizziness, and extreme fatigue. There are two kinds of antibodies that lead to the hepatitis infection: IgM and IgG. The Hepatitis A Virus IgG test detects the presence of the IgG antibodies in the blood and informs of the possible health problems.