Immune

adj. not susceptible to a disease, safe from disease; inoculated; resistant; exempt, free, protected

n. one who is immune, one who is insusceptible to a disease

Immunity is a medical term that describes a state of having sufficient biological defenses to avoid infection, disease, or other unwanted biological invasion. Immunity involves both specific and non-specific components. The non-specific components act either as barriers or as eliminators of pathogens to stop infection by micro-organisms before they can cause disease. Other components of the immune system adapt themselves to each new disease encountered and are able to generate pathogen-specific immunity.
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Noun
1. a person who is immune to a particular infection
(hypernym) person, individual, someone, somebody, mortal, human, soul
(hyponym) carrier, immune carrier
Adjective
1. relating to the condition of immunity; "the immune system"
(pertainym) unsusceptibility, immunity
2. secure against; "immune from taxation as long as he resided in Bermuda"; "immune from criminal prosecution"
(similar) exempt
3. relating to or conferring immunity (to disease or infection)
(synonym) resistant
(similar) unsusceptible, insusceptible
4. (usually followed by `to') not affected by a given influence; "immune to persuasion"
(similar) unaffected

adj. immune, not susceptible to a disease, resistant, protected

adj. immune, exempt, free