EBV-EA protein.The protein contains the EBV early antigen proteinfragment, The protein is purified by proprietary chromatographictechnique.Epstein-Barr virus, frequently referred to as EBV, is amember of the gamma herpesvirus family and one of themost common human viruses. The virus occurs worldwide,and most people become infected with EBV sometimeduring their lives. It persists in B lymphocytes for the lifeof the host.IgG to the early antigen appears in the acute phase andgenerally falls to undetectable levels after 3 to 6 months.In many people, detection of antibody to the early antigenis a sign of active infection, but 20% of healthy peoplemay have this antibody for years.;