Immunology is the ponder of atoms, cells, and organs that make up the safe framework. The work of the safe framework is to recognize self antigens from non-self antigens and guard the body against non-self (outside) operators. Through particular and non-specific defense instruments, the body’s safe framework is able to respond to microbial pathogens and ensure against malady. The primary line of defense against disease is intaglio skin, mucosal film surfaces, and emissions that anticipate pathogens from entering into the body. When a foreign operator enters the primary line of resistance, an safe response is inspired and safe cells are enrolled into the location of contamination to clear microorganisms and harmed cells by phagocytosis. In the event that the irritation remains irritated, antibody-mediated safe response is actuated and distinctive sorts of safe cells are locked in to resolve the illness. The safe framework is composed of cellular and humoral components. The cellular component incorporates