[Magnius' E-antigen]

The "e" Ag/Ac system found by Magnius in 1972 is discussed briefly. The new antigen has the same immologic and physiochemical characteristics of HBs and HBc of the hepatitis virus. Its existence shows the chronic evolution of the disease in Ag HBs carriers. Therefore the "e" antigen has a prognostic value in Ag HBs carries.