Plus, with measles, a sick person has to be near a non-immune person, not miles downstream (as can occur with polio).
The first thing was to let an infected mosquito bite some non-immune person.
All the natives of these islands are non-immune because there has never been any yellow fever there.
non-immune animals subjected to the attacks of the insect carrier, quickly succumbed to the disease.
In this room a non-immune exposed himself so that he was bitten by several of the insects.
mid-15c., "free; exempt," back-formation from immunity. Cf. Latin immunis "exempt from public service, free from taxes." Specific modern medical sense of "exempt from a disease" (typically because of inoculation) is from 1881. Immune system attested by 1917.
immune im·mune (ĭ-myoōn')
Of, relating to, or having immunity to infection by a specific pathogen.
Relating to the mechanism of sensitization in which the reactivity is so altered by previous contact with an antigen that the responsive tissues respond quickly upon subsequent contact.