I’m afraid the horse is out of the barn. Our borders are nonexistent. Even if we decided today to put an end to the nonsense we see on our borders and moved troops to seal the borders, how long would it take to seriously secure them. I think the airplane scenario is realistic. Just a few affected people on several international flights and the disease is spread to multiple countries in a matter of hours not even days.
Prepping for BioHazard event is a real challenge. Once again where do you put your priorities? Is Ebola the new Black Death? In our globally connected society where the vast majority of the population is unprepared for a snow storm an outbreak like this would be apocalyptic.