Oh for pete's sake…
Ebola has a high risk of infection but a very low risk of contagion. These are two very different factors in the disease's vector. The odds of the average North American contracting Ebola are so microscopic it's ridiculous.
Once again we human beings demonstrate that we're utterly crapola at assessing risk. We're still wired to stalk antelope in the tall grass and run the hell away from lions.