Hepatitis A IgM antibody (anti-HAV IgM) - Indicates a recent HAV infection. Hepatitis B surface antigen (HBsAg) - Indicates current HBV infection. Hepatitis B core antibody (anti-HBc) - Indicates past or current HBV infection. Hepatitis B surface antibody (anti-HBs) - Indicates immunity to HBV. Hepatitis C antibody (anti-HCV) - Indicates past or current HCV infection.