Ok, but you aren't getting into the US without being asked those questions, at all. Do you have a cruise coming up? I do in 20 something days now. I am as concerned about embarking on that ship now, as I was 6 months ago, what with all of the gross *** people who don't wash their hands and pick both ends of their body, But getting on an American based ship is more likely to carry a risk of exposure to influenza or Noro than Wuhan. Now, maybe we find some things out in the future that make me change my mind. For now, this is controlled in the States and Disney sails out of the US. I would be more concerned if I were embarking from Vancouver, since Canada refuses travel bans (at least they were yesterday, this is evolving), but no ships are currently sailing out of Canada.
And as an aside, I'm not surprised at all that open circuit cruises with few security controls, sailing in the affected region, to ports that refused to enact any restrictions or screening when this thing dropped, are the ones with quarantines right now. DCL and others enacted their bans pretty quickly. Disney isn't taking chances.