That particular paragraph is referring to Ebola Reston- that is- Reston, Virginia, where that particular strain spread in a monkey holding facility, from room to room, through air vents. It was airborne, yet it never infected humans, only the crab-eating monkeys at the facility. The caretakers at Reston were not equipped, nor did they take the precautions for what they were dealing with, and yet, none were infected, because that strain could not pass into or survive our bodies.
Unfortunately, many forums have confused Reston with ALL of Ebola, and it is simply not true. The Ebola mutations we know about are not airborne. The blood, even when sprayed all around the room when a patient crashes and bleeds out, simply does not aerosolize well at all.
BTW, both Writebol and Brantly probably caught Ebola when they were working in the de-containment area, which is one of the most dangerous areas to be working, as often the helpers interact with live virus without necessary protection.
Although Ebola cannot spread like the flu, it is extraordinarily interesting, in what it does and how it does it. At a certain point, it strives to turn the human body into itself. This is called amplification. At this point, the patient has been throwing up vomit negro for some time. A patient will do this long after the stomach is empty. This vomit is often comprised of organ linings, tongue linings, blood, etc. It is hot with Ebola. If you looked at it under a microscope, you would see little black squiggles. If you looked at those under an electron microscope, you would find bricks of compacted ebola. They are called crystalloid structures, and when the patient crashes and makes quite the bloody mess, these seedlings spread far and wide, looking for a new body as the former no longer has any use for the virus.
In West Africa, the virus has no need for airborne qualities: it has abject poverty, a general lack of medical supplies, and a general distrust of hospitals and aid workers. Of course times have changed a bit since Ebola Zaire raised its ugly head along the Ebola River, in the area of Bumba, on September 1st, 1976. In those days, nurses were so often given five syringes to use through the entire day, only one pair of gloves, and a certain ignorance- that early Ebola symptoms looked a hell of a lot like Malaria. So what happens? In most cases of Ebola as well as Marburg, someone brings it in to the village. Perhaps they were hunting or fishing, or more likely, they were cutting down trees and building roads through the jungle. Either way, they got sick. They spread it first to their family, and eventually, at some point, they sought care at the village hospital. The nurses took blood samples, and diagnosed them with malaria. The hospital is where Ebola kills a village. When aid workers reached Bumba after several weeks without radio contact, they at first found a large pile of burnt mattresses in the soccer field. Then they found Yambuku Hospital. Two nuns and one doctor were still alive. Ebola Zaire burned through everything else. One of the nuns at Yambuku flew to Kinshasa to seek treatment, after realizing she had been infected. From her it spread to a young nurse at the hospital, named Mayinga N'Seka. Her name is infamous. It is the name written on several vials of ebola at USAMRIID, because it was her blood that was the first to arrive for testing in the US. The story of Mayinga is a very sad story of a young nurse desperate to arrange travel to Europe to begin her advanced training, WHILE dealing with the symptoms of the most deadly form of Ebola.
Her picture is famous. Look up Ebola Mayinga, and the first picture on google is of a hospital room, with Mayinga herself laying in bed, and two nurses attending her. They have plastic covers on their shoes, and one nurse is looking right at the camera. She is scared shitless.