You immune system must be strong to fight other viruses as well. The body’s system of defenses against infective organisms or other foreign bodies invading the body. Immunity. The immune system is a complex system of blood cells and organs, and it protects the body from harmful germs that can cause illness. The immune system (from the Latin word immunis, meaning: "free" or "untouched") is the body’s defense system. All content on this website, including dictionary, thesaurus, literature, geography, and other reference data is for informational purposes only. Save my name, email, and website in this browser for the next time I comment. Many people with autoimmune diseases have characteristic types of self marker molecules. Innate (Natural) Immunity: It is the natural resistance components such as intact skin, salivary enzymes, and neutrophils, natural killer cells, which provide an initial response against infection that is present in an individual at birth before exposure to a pathogen or antigen. Immunity definition is - the quality or state of being immune; especially : a condition of being able to resist a particular disease especially through preventing development of a pathogenic microorganism or by counteracting the effects of its products. immunity definition: 1. a situation in which you are protected against disease or from legal action: 2. a situation in…. It is the immune system’s job to keep them out or, failing that, to seek out and destroy them. Helper T cells. During Covid-19 outbreak, immunity meaning is often discussed and many believe that strong immunity is required only for preventing coronavirus. 287 (1812). The immune system is the set of tissues which work together to resist infections.The immune mechanisms help an organism identify a pathogen, and neutralize its threat.. Hi there, You’ve done a fantastic job. Columbia University scientists have successfully used genetically reprogrammed bacteria to alert the, All of these modern stressors lead to an imbalanced, Q Is there anything you can do to improve your, Janko Nikolich-Zugieh of the Oregon Health and Science University in Beaverton, Ore., and his colleagues suspected that the, Because these are the things that give our, Dictionary, Encyclopedia and Thesaurus - The Free Dictionary, the webmaster's page for free fun content, Scientists engineer cancer-fighting bacteria, 6 Warning Signs of a Weakened Immune System, The immune system does not recover despite cured hepatitis C infection, 21st century diseases: the newest threat to your health, The future of immune health products lies in the balance, Restricting calories keeps immune system young. Five different types of white blood cells exist. The most common types of allergic diseases occur when the immune system responds to a false alarm. ; a legally established condition: The court granted the witness immunity from prosecution. The immune system is the body’s network of cells and organs that is specially developed for fighting off infections. Immunity from prosecution is a doctrine of international law that allows an accused to avoid prosecution for criminal offences. Acquired immunity: Immunity acquired by infection or vaccination (active immunity) or by the transfer of antibody or lymphocytes from an immune donor (passive immunity). immune [ĭ-mūn´] 1. being highly resistant to a disease because of the formation of humoral antibodies or the development of immunologically competent cells, or both, or as a result of some other mechanism, as interferon activities in viral infections. is the largest lymphoid organ in the body. 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