Hepatitis B surface antigen (HBsAg) A protein of the surface of hepatitis B virus; It can be detected in high levels in serum during acute or chronic hepatitis B virus infection. The presence of HBsAg indicates that the person is infectious. The body normally produces antibodies to HBsAg as part of normal immune response to infection. HBsAg is the antigen used to make hepatitis B vaccine. Hepatitis B surface anti-body(anti-HBs) The presence of anti-HBs is generally interpreted as indicating recovery and immunity from hepatitis B virus infection. Anti-HBs also develops in a person who has been successfully vaccinated against hepatitis B. Total hepatitis B core antibody(anti-HBc) Appears at the onset of symptoms in acute hepatitis B and persists for life. The presence of anti-HBc indicates previous or ongoing infection with hepatitis B virus in an undefined time frame IgM antibody to hepatitis B core antigen(IgM anti-HBc) Posit...