im·mune 
(ĭ-myn)
(ĭ-myn)adj.
1.
a. Not subject to an obligation imposed on others; exempt: immune from being eliminated in a contest.
b. Having legal immunity: immune from taxation.
2. Not affected by a given influence; unresponsive: immune to persuasion.
3. Immunology
a. Of or relating to immunity or an immune response.
b. Having resistance to a specific pathogen.
c. Having or producing sensitized antibodies or lymphocytes that react to specific antigens: immune serum.
[Middle English, from Latin immūnis; see mei-1 in the Appendix of Indo-European roots.]