Vehicle of Transmission.The matter, usually inanimate, in which pathogenic agents are present and survive until there is physical contact (including ingestion) with susceptible persons (hosts).
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- 传播媒介:致病病原在其中可存活,直到易感染者(宿主)与之有身体上的接触(包括摄食)的物体,通常为无生命体。