Source:http://linkedlifedata.com/resource/umls/id/C0301872
GO: Any immune system process that functions in the calibrated response of an organism to a potential internal or invasive threat. [GO_REF:0000022, GOC:add, GOC:mtg_15nov05],NCI: The activity of the immune system against foreign substances (antigens).,NCI: Any immune system response of an organisms to an internal or invasive threat.,CSP: alteration in the reactivity of the immune system of an organism in response to an antigen; in vertebrates, this may involve antibody production, induction of cell mediated immunity, complement activation or development of immunological tolerance.