Objection : this study is to prepare a kind of bispecific antibody of anti - hiv p24 antigen and anti - human rbc type a antigen , and to build a new way to detect hiv p24 antigen with this bispecific antibody 目的:制備抗hivp24和抗人a型紅細胞雙特異性抗體,建立檢測hivp24抗原的新方法。