an agent used as a vehicle for transfer. A disease vector
is an agent that transfers a pathogen from one organism to another (e.g.,
an insect). A viral vector is an engineered virus used to introduce genes
into cells, or a live virus used as an antigen delivery vehicle in a vaccine.
VectorJAMA A nonpathogenic bacterium or virus used to transport an antigen into the body to stimulate protective immunity (eg, in a vaccine). See also Antigen.
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