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|Noun||1.||immune carrier - (medicine) a person (or animal) who has some pathogen to which he is immune but who can pass it on to others|
transmitter, vector - any agent (person or animal or microorganism) that carries and transmits a disease; "mosquitos are vectors of malaria and yellow fever"; "fleas are vectors of the plague"; "aphids are transmitters of plant diseases"; "when medical scientists talk about vectors they are usually talking about insects"
immune - a person who is immune to a particular infection