It's the same virus in all stages. From the literature:
Of particular concern is the frequent presence of EBOV in saliva early during the course of disease, where it could be transmitted to others through intimate contact and from sharing food, especially given the custom, in many parts of Africa, of eating with the hands from a common plate.
Obviously that would include sneezing. The reason why health care workers get it is they are covered in viruses and have woefully inadequate protection including a face mask that does not seal. So a droplet can get in their eyes and in that sense it is airborne.
OTOH if Duncan had sneezed on the people in the apartment they could have gotten infected (in theory).
Then think feet....How many people walk around in socks or barefooted...especially in Texas. Another big sweat area...
The infected is a walking ebola factory.
Consider it a "touch" disease....just like smallpox.
In our early days....people were confined to their homes. Some made it...some didn't. Then everything was burned and/or cleaned with "Clorox".