immunity

noun (plural immunities)

• 1 [mass noun] the ability of an organism to resist a particular infection or toxin by the action of specific antibodies or sensitized white blood cells:immunity to typhoid seems to have increased spontaneously

• 2protection or exemption from something, especially an obligation or penalty:the rebels were given immunity from prosecution
• Law officially granted exemption from legal proceedings or liability.
• lack of susceptibility, especially to something unwelcome or harmful:products must have an adequate level of immunity to interference