: Distinguishing the host's own cells ("self") from foreign elements ("non-self").
: An overreaction to harmless environmental substances. Immunology
: As the body’s first line of defense, the Innate Immune System is non-specific and immediate. It includes physical barriers like the skin and mucous membranes, as well as specialized cells like neutrophils and macrophages that engulf and destroy invaders through a process called phagocytosis. : Distinguishing the host's own cells ("self") from
: Utilizing immunotherapy to train the immune system to recognize and destroy tumor cells. Essay | Nature Reviews Immunology Immunology