Where is air travel restricted? If someone isn't symptomatic yet, there is nothing to stop them from getting on a plane.
Transocean travel via ship still exists, crewmen could jump ship, and the passage would only take a few days. Being symptomatic is not guaranteed.
That is without intentionally bringing contaminated material, preserved, to become infected at a jihadi's leisure.
The actual infection, given a well-handled sample of the virus, could take place anywhere, any time.
I had a hard time believing that thousands of kids could show up nearly simultaneously on our southern border from as far away as central America, undocumented, in reasonably good condition given the trip, but they did.
Keep in mind that the average incubation period of Ebola is 7 or 8 days, with the limits being 3 and 21 days.
I have seen a few stories that suggest that it is very difficult to fly in or out of the affected countries right now: Fear spreads, borders close as Ebola restricts travel in West Africa, Travel restricted within Ebola-affected West African countries
It is conceivable that illegal immigrants would try to stow aboard a cargo ship, but I think that those are being scrutinized, as well. Malta rejects ship with suspected Ebola case. I think it takes several days for a cargo ship to cross the ocean, so anyone infected with Ebola would probably start showing symptoms before the ship arrived.
Illegal immigration is not going to bring Ebola into this country, IMO. If an Ebola victim arrives, it will be via air travel.
EarlyBird, you should appreciate this. Yesterday, I was supposed to attend a VTC. I went to the VTC room with another PhD scientist and a Masters level colleague. We stared at the black VTC screen, looked at each other, asked each other what was wrong (Did we get the room wrong? What about the time?). Finally, the woman with a Masters called for IT support. The IT guy came and determined that the equipment had been turned off...