Introduction: Different Types of Immunological Unresponsiveness

摘要: Several events may result from appropriate contact with antigenic material. First. An immune response occur accompanied by circulating antibody. Second. The animals not produce antibody, but be primed for a second which results in an enhanced response. Third. Cell-mediated hypersensitivity occur. Fourth. animal develop tolerant or unresponsive state to subsequent contacts the same antigen. This is antigen-directed that it does require prior Tolerance different types of antigens cellular events. It has been recently suggested tumors and histocompatibility involves enhancing blocking On other hand, we enjoy our own body constituents central inhibition where there absence