I think we are seeing a mutation, you guys. It's got to be spread through the air, for the taxi people to get it; and it has got to be insanely small to penetrate the level 4 containment suits those guys wear. Either that, or it lives on surfaces in such a manner as to be unable to be killed - like some of the spores that viruses can develop.
I suspect that they're bringing the two patients to Emory because there will be huge numbers of tests, and lots of experimental treatments performed on them...maybe from this there will be some sort of cure/treatment developed.
This disease - this class of viruses - scares me poopless. Not only is it incredibly virulent, there's no treatment, and patients die very horrifically.
My prayers are with everyone...everywhere.
Best-
Herding Cats