I'm back to my hypothesis....nothing will stop the self-destruction of civilization except for defined and enforced national borders, stable governments, and the ability of nations and regions to be self-sufficient. Everything the US and other global powers are involved with is creating just the opposite.
Ebola can spread by someone sneezing on you - or by you touching an elevator button or a door knob an Ebola victim touched three days before. The virus can live outside the body for DAYS... not just hours.