infectious or contagious, capable of being passed on or transmitted (communicated) from one person to another, describing a disease or a medical condition;
e.g. The disease is highly communicable, so you should try to isolate yourself so you don't spread it to others.
(adjective)
capable of being conveyed or communicated to other people;
e.g. Reporters often try to frame a communicable summary of an incident to efficiently inform people what happened.