Contagion
the communication of a disease by contact with the person laboring under it, as distinguished from in- fection, used to signify its transmission by means of the air without actual perused in both of these senses, and is disonal contact with the diseased person. used in both of these senses, and is di- But sometimes the word contagion is arations of tuberculin now in use.
KOCH, ROBERT. municated by the air. tagion, that produced by actual contact, and mediate or remote contagion, com-