Yeah, it makes some sense to factor in the possibility of partial route closures and quarantines. And, if things get really bad, people will cut down the domestic flying as well. Would you fly a plane where it was known that someone had come down with ebola and projectile vomited all over the seats? It would take a lot of convincing to make people believe the decontamination was effective.
I guess just avoid the ones with spit ,vomit or blood stains on the headrest.
(No known regulations on standards for cleaning planes )