Bingo. Just thinking the same thing...but on the PLANE. Air recirculation and (unknown to me) maintenance/cleaning of same (or even if they have some kind of anti-XYZ scrubbers)
The guy on the flight into Nigeria died a few hours after he got off. He was dying on the plane and killed the woman next to him (probably a droplet of bloody vomit) and killed the flight attendants who had to clean up not knowing it was Ebola. But the other 46 passengers were not infected.