[名词解释] 免疫应答(immune response)

细胞活力测定 选择素家族(selction family) 白细胞分化抗原(leukocyte differentiation antigen) 归巢受体(homing receptor) 细胞毒T淋巴细胞抗原-4(cytotoxic T lymphocyte antigen-4，CTLA-4) 免疫应答(immune response)