Pathology is a part of restorative science essentially concerning the examination of organs, tissues, and natural liquids so as to make a finding of disease. Immunopathology is a part of biomedical science worried about immune reactions to disease, with immunodeficiency diseases, and with diseases brought about by immune systems. It incorporates the investigation of the pathology of a life form, organ system, or disease concerning the immune system, insusceptibility, and immune reactions. The immune neurotic response is brought about by arrival of poisons and the apoptosis of tainted cell.