The process of thymic negative selection is the process of the central immunologic tolerance, namely the process of autoreac-tive thymic cells being deleted or becoming allergy.

• 胸腺内阴性选择的发生过程也就是中枢免疫耐受的形成过程,即自身反应性胸腺细胞被克隆清除或处于免疫无能状态的过程。