Immunological detection is the body's recognition of "self" and "non-self" antigens, antibodies form a natural immune tolerance, on the "non-self" antigens rejection of a physiological function in.Under normal circumstances, this beneficial physiological functions of the body, can produce resistance to infections, tumors, such as maintaining the physiological equilibrium and stability of immune protection.Under certain conditions, when the immune dysfunction, also would be bad for the body to produce the reactions and results, such as causing hypersensitivity reactions, such as autoimmune diseases and cancer.