(medicine) the condition in which an organism can resist disease
"After recovering from the flu, she developed immunity to that specific strain and did not get sick again."
an act exempting someone
"he was granted immunity from prosecution"
The state of being insusceptible to something; notably:
"After receiving the vaccine, he felt a sense of immunity against the flu virus."
Fully protective resistance against infection.
"The vaccine provided complete immunity, ensuring she remained fully protected against the virus even after exposure."
In plain English: Immunity is your body's natural ability to fight off and stop certain germs from making you sick.
"The doctor explained that having immunity to the flu means you won't get sick even if exposed to the virus."
Usage: Immunity refers specifically to the body's ability to resist or recover from infectious diseases, distinguishing it from general protection against other harms like colds caused by viruses that lack specific antibodies. Use this term when discussing medical defenses rather than broad metaphors for exemption from rules or laws.
The word immunity comes from the Latin immunitas, which originally described a legal exemption or freedom from certain duties. It entered English through Middle French and Old French before taking on its modern meaning regarding protection from disease.