“INFECTIOUS DOSE: 1 - 10 aerosolized organisms are sufficient to cause infection in humans (21).”
I wonder how many "aerosolized organisms" are in a decent sized sneeze from the seat next to you on an airliner?????
The Ebola "virion" is typically 980 nanometers in length which is 3.9 × 10-5 inches.
Just think how LITTLE material you need to get infected!