Characterised by action, not passive, not expectant.
(Science: immunology) The condition of being immune, the protection against infectious disease conferred either by the immune response generated by immunisation or previous infection or by other nonimmunologic factors.
Origin: L. Immunitas The quality of being unaffected by something; immunity to criticism. An act exempting someone; he was granted immunity from prosecution. The state of not being susceptible; unsusceptibility to rust.(medicine) the condition in which an organism can resist disease.See active and passive immunity.