Interesting Wasabi, as I read this article yesterday also. It does make one wonder, how much they know definitively. My guess is, like many things, we are not being told everything. I did not see that the CDC removed information regarding airborne transmission. That for me is disconcerting. I would like to think that it is over caution on the part of doctors, but I don't think any of us can say for sure, at this early stage.
My thought is, I think you have to ask yourself, how many people have boarded planes for other parts of the world without knowing they were infected. Only now are officials beginning to monitor travels.