You're half right on this topic. Viruses can and do mutate constantly, but these mutations are primarily adaptations to immune responses - that is typically what makes antigenic drift a PITA and antigenic shift a nightmare when it happens to common viruses. However, in our entire history of viral study and research, we have NEVER, under any circumstances, seen a human virus change the way it is transmitted (save through intentional and limited modification by a research team). It can become more infectious, but a virus that spreads through body fluid contact simply does NOT suddenly go airborne - except in movies like Outbreak.
We know this in part because researchers have created fully airborne versions of a flu virus (!!!), and even though it can already be spread via aerosol, to allow it to go fully airborne basically required a complete rewrite of the virus' RNA. The truth is that you have a better chance of being killed by a comet landing on your forehead than Ebola does of going airborne.
HERE is an excellent article on the topic.
Also, Fox WARPED the facts provided by the CDC in order to drum up panic for political reasons. Were that not the case, the hysteria would not have vanished the day after the elections. Keep in mind we're talking about a "news" organization that (successfully) argued in court that intentionally lying on-air and presenting it as news is perfectly legal as long as they don't cross over into straight-up slander and libel, and that the FCC cannot block them from doing it or fine them for it. Even minimal fact-checking has shown that at least 50% of what Fox airs is flat-out false.