This is the latest and greatest from the Centers for Disease Control and Prevention (CDC). They note that we very early in the new coronavirus 2019-nCoV. Therefore, more information will likely be forthcoming as more is known about the disease and its transmission. Thus, you see the "interim" in the title of the guidance.
Eric Holdeman is a contributing writer for Emergency Management magazine and is the former director of the King County, Wash., Office of Emergency Management.