Sweat is not my worry, no way am I hugging a hot sweaty ebola patient. The problem that people do not want to recognize is that a 1 micron virus (ebloa) is capable of escaping the mouth and becoming airborne either as a single particle or combined with a droplet.
Droplets 1-4 microns in diameter are called ‘droplet nuclei’; these remain suspended in the air for very long periods and may not only travel long distances, but can reach the lower respiratory tract. Inhalation of droplets and droplet nuclei places virus in the upper respiratory tract, where it may initiate infection. A sneeze can create 20,000 droplets.