Vapor eh?
No.....not with the Ebola we are dealing with. It does not affect the upper respiratory system, which is what it needs to do to precipitate a sneeze, for example. But even that is not "Vapor".
However it is one of the ways common flu is spread. Comprised of small droplets, each carrying 100s of viruses, these small droplet of bodily fluid can, with the aid of a fan or wind, or the force of the sneeze, travel quite some distance before hitting the ground or floor or other solid object.
But again, the Ebola we are talking about does not do that. There was one variant known to exist in 1989 that did, but it was harmless to humans and only killed a specific monkey species. It was called the Reston Strain. BTW, it was not spread through AC ducts as the AC was broke and had been for some time. In fact, they initially thought the monkeys were dying from the poor care they were receiving. The place was a animal nightmare.
Far as I know, that was the last we ever saw of it. After killing 400 or so monkeys and decontaminating the building before demolishing it. But it did appear to attack lung tissue where the human strains do not.
To the best of my knowledge on the subject.
OK....now you can return to the "we are all gonna die" thread.
Well 'spit' will transmit the virus. That is acknowledged by the Berkeley Psychology PhD candidate that published a myth and Rush-buster article in Slate Monday afternoon. She also presents a long list of vectors that "do not transmit", yet examples in Africa appear to show transmission on inanimate objects, such as the doctor's assistant mentioned above who was adjusting the doctor's protective gear.