I think it’s too early to postpone anything. As it stands, corona virus is about as dangerous as the flu is currently, and hopefully it will die-down soon and not be a threat at all. Personally I don’t think the public should stress too much over the virus and use common preventive measures you would use during flu season (washing hands, covering coughs/sneezes, etc.), and let organizations like Health Administrations, CDC, and the like to the prepping/worrying part. Of course if you do feel sick prior to a long trip or flight, consider postponing it, because it is no fun being in a new place while sick.