One day...some guy will have the genetics to be a ‘carrier’ of Ebola, and launch it back into the US, after a two week safari to Africa.
Think of some homosexual flight attendant (but, I repeat myself) who will travel about the globe and have 'gay' sex with multiple partners at every stop?
Could such a scenario play out? /s
One day? From what we already know, all people have the genetics to be a "carrier" of Ebola--that's how infectious diseases work.
What we know of Ebola so far though, is that it hits humans pretty quickly--there's less time for them to mingle on public transportation, schools, offices and restaurants, so there's less chance the disease travels as far.
In other words, unless the safari traveler is infected with Ebola on the very last day of their African trip, they will exhibit severe symptoms within 1-2 days of exposure, most likely on their safari.
I'm not saying a new strain could appear--who knows what Dr. Mengele (aka, Fauci) might have done with gain of function and Ebola.