免疫学传统观念一直认为是研究传染病的特异预防和诊治的专科,而对机体因免疫功能失调所引起许多免疫性疾病却没有正确的认识。近十余年来,免疫学的概念扩大了,除抗传染免疫外,还包括机体对非病原生物异体物质或改变了性质的自身组织及细胞所引起一切免疫反应的非传染性免疫。非特异性免疫防卫系统包括: 一、非特异性免疫防卫系统(一)机械屏障结构(皮肤、粘膜、血脑屏障及血胎屏障)。(二)吞噬细胞因素:网状内皮系统的巨噬细胞 The traditional concept of immunology has long been considered as a specialist in the prevention and treatment of infectious diseases, but there is no correct understanding of the many immune diseases caused by immune dysfunction in the body. In the past decade or so, the concept of immunology has expanded. In addition to anti-infective immunity, it also includes the non-contagious immunity of the body to all non-pathogenic organism or self-organization and cells that have changed their nature. Non-specific immune defense system includes: a non-specific immune defense system (a) mechanical barrier structure (skin, mucous membrane, blood-brain barrier and blood-cell barrier). (B) phagocytic factors: reticuloendothelial system of macrophages