肝炎协同抗原(简称HBAg)并不是单一的抗原,而是一种复合抗原,可分为几种亚型:LeBouvier等发现所有的HBAg具有共同的决定簇抗原a。除a外,在不同的病人可有决定簇组抗原d或y,d和y并不同时存在而是分别与a抗原相伴。因此可将HBAg分为ad和ay二种亚型。最近又发现另二种新的决定簇组抗原w和r,二者分别与ad或ay伴 Hepatitis Synergistic Antigen (HBAg) is not a single antigen, but a complex antigen that can be divided into several subtypes: LeBouvier et al. Found that all HBAg have a common determinant antigen a. In addition to a, in different patients may have determinant group antigen d or y, d and y do not exist at the same time but with a antigen. Therefore, HBAg can be divided into ad and ay subtypes. Recently found another two new determinant group of antigens w and r, both with ad or ay with