In quarantine, with proper hydration and symptomatic treatment, survival might be a whole lot better than 10% - or it might be close to zero if our dear leaders are saving those medical dollars for politically important conditions like HIV treatment and gender "reassignment". Hiding out infected, afraid of FedGov and those who might report to CDC, the outcomes could be almost universally grim. Hiding out before exposure in isolation as an individual, a family, or a community with a year's supplies, the risk of Ebola would be close to zero, but there is no guarantee the disease wouldn't find a host animal to hide out and flare up again once those supplies ran out. The keys will be how early cases are reported to be treated and whether the media have any credibility when the first hemorrhagic fever hits our country.
The very young (under age 2) and very old (over 65) are at much greater risk if it's spreading through random exposure. Druggies and gay men are at far greater risk than those who make healthier choices. The urban poor and city people in general are at far greater risk than those of us in flyover country.
I hope God forgives me for saying this, but I am SICK of AIDS being given all the attention while disease like Ebola are given short shrift. Unless there is rape or medical malpractice, people who get it often bring it upon themselves (unless there is marital infidelity via a spouse) through their own lifestyle choices.