a person who is immune to a particular infection
"After receiving the vaccine, she was completely immune to that strain of the flu."
A person who is not susceptible to infection by a particular disease
"After receiving the vaccine, she became immune to the flu and did not catch it during the season."
In plain English: An immune is someone who has built up resistance to a specific disease and won't get sick from it again.
"She is an immune to all kinds of criticism and never lets anyone get under her skin."
Usage: Use this noun form only when referring specifically to an individual or group protected against a specific illness, rather than the more common adjective describing general resistance. Avoid using it as a standalone subject unless clearly identifying people within a medical context.
To make immune.
"The doctor administered the vaccine to make him immune to measles."
secure against
"immune from taxation as long as he resided in Bermuda"
"immune from criminal prosecution"
Exempt; not subject to.
"Small businesses are often immune from certain federal regulations, allowing them more flexibility than larger corporations."
The word immune comes from the Latin phrase immūnis, which originally meant "exempt from public service." It traveled into English through Middle French and Middle English, eventually evolving to describe a state of being protected or free from disease.