Immunology is a branch of biology that covers the investigation of resistant systems in all organisms. Immunology graphs, measures, and analyze the physiological working of the insusceptible framework in conditions of both well being and diseases glitches of the safe framework in immunological scatters, (for example, immune system diseases, hypersensitivities safe deficiency, and transplant rejection the physical, synthetic and physiological qualities of the parts of the safe immune system and in vitro. Immunology includes many other minors and major domains of medicine, especially in the fields of organ transplantation, oncology, rheumatology, virology, bacteriology, parasitology, psychiatry, and dermatology. The utilization of the immune system cells to treat a disease or confusion is known as immunotherapy. Immunotherapy is most regularly utilized with regards to the treatment of tumors together with chemotherapy (medications) and radiotherapy (radiation).