Immunology is a part of science that covers the investigation of resistant frameworks in all life forms. Immunology outlines, quantifies, and contextualizes the physiological working of the invulnerable framework in conditions of both wellbeing and ailments; breakdowns of the insusceptible framework in immunological scatters, (for example, immune system ailments, hypersensitivities, safe inadequacy, and transplant dismissal); and the physical, substance, and physiological attributes of the parts of the resistant framework in vitro, in situ, and in vivo. Immunology has applications in various orders of medication, especially in the fields of organ transplantation, oncology, rheumatology, virology, bacteriology, parasitology, psychiatry, and dermatology. The term was authored by Russian scientist Ilya Ilyich Mechnikov, who best in class concentrates on immunology and got the Nobel Prize for his work in 1908. He stuck little thistles into starfish hatchlings and saw bizarre cells encompassing the thistles. This was the dynamic reaction of the body attempting to keep up its respectability. It was Mechnikov who originally watched the wonder of phagocytosis, where the body shields itself against an outside body.