I'm Concerned about the Potential "Mushrooming" Effect with Ebola

I'm reading these threads, and realizing that there are people here who are still saying that this aEbola situation is practically much ado about nothing. Well, let me throw out a few facts:

(1) The WHO is now projecting that we will soon see 10,000 new cases of Ebola EACH WEEK. Now, obviously they are talking about the epidemic growing in the already affected areas of Africa.
HOWEVER, this projection of an exponential increase means that the potential for Ebola-infected people traveling to America could increase exponentially, too.

(2) Each one of these Ebola victims has had dozens of "direct" contacts. It appears that we have had mostly good news so far regarding the contacts for Duncan, except for 2 healthcare workers, but if/when there are more people testing positive for Ebola, the number of contacts for these people will probably be in the dozens, too. In fact, the second healthcare worker was on a commercial flight just 2-3 days ago, and her potential contacts from the flight alone is up to 132.

That's my biggest concern. The sheer number of people coming into contact with infected people, and the possibility that these numbers could end up growing exponentially. I'm reluctant to use the term "law of averages," but this is what bothers me the most.

Are we already in the process of experiencing this?

EDIT - I've corrected my mistake of attributing that projection to CDC. it was the WHO that issued the projection.