Trowsdale, John Human Immunogenetics Laboratory, Imperial Cancer Research Fund, London, United Kingdom.
Last reviewed:June 2019
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- Natural or innate immunity
- Adaptive immune response
- Passive immunization
- Hypersensitivity reactions
- Suppression of immunity
- Links to Primary Literature
- Additional Readings
A state of resistance to an agent—the pathogen—that normally produces an infection. Immunity is the condition of a living organism whereby it resists and overcomes an infection or a disease. Typical infectious pathogens include microorganisms, such as bacteria and viruses, as well as larger parasites. The immune response (Fig. 1) that generates immunity is also responsible in some situations for allergies, delayed hypersensitivity states, autoimmune diseases, and transplant rejection. See also: Allergy; Autoimmunity; Infection; Pathogen; Transplantation biology
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