I could give a rats rear what their definition of airborne is, since people are dying who were around the Ebola patient who died in Dallas. Nurses are good at taking precautions, and disposing of waste....I think there is more to how you can get it than is being said.
Ordinary nurses have had no training whatsoever in Level 4 biocontainment and medicine. Plus these particular nurses had no Level 4 PPE or facilities at all.