Synonyms: carrier, immune carrier
Definition: (medicine) a person (or animal) who has some pathogen to which he is immune but who can pass it on to others
Similar words: vector, transmitter
Definition: any agent (person or animal or microorganism) that carries and transmits a disease
Usage: 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
Similar words: immune
Definition: a person who is immune to a particular infection