That is the thing about medicine. It is not settled science, but instead based on opinions.
Believe what you want, but the risk of Ebola getting out is Zero if there are no cases in the US. That is no longer the case.
Even if something utterly stupid happened, and it did manage to get out.
It would be easily contained.
But it won’t. Unless someone does it intentionally.
But that is another topic...entirely. And it could be done without these two people being moved to the US.
But they would never do it, unless all they wanted to do was to scare the beans out of some people. The disease is not something one would consider using as a weapon because it is far too hard to spread.
That should tell you something..