immunity im·mu·ni·ty (ĭ-myōō'nĭ-tē)
The quality or condition of being immune.
Inherited, acquired, or induced resistance to infection by a specific pathogen.
The protection of the body from a disease caused by an infectious agent, such as a bacterium or virus. Immunity may be natural (that is, inherited) or acquired. See also acquired immunity.
The ability of the body to resist or fight off infection and disease.