As the Ebola virus is taking hold in Western Africa, it is still at a place where it can be contained. The global economy can sustain an entry ban for those countries with high infection rate. If the virus jumps to a major global economic nation, the virus will be much more difficult to contain given the degree of travel required to sustain these economic ties.
We have already seen a confirmed infection within the US (Dallas Texas), it is now time to take action. While this virus on a relative basis may not be as contagious as others, the mortality rate is so high (60%-90%) that even a slow transmission or minor outbreak would be costly in American lives.
Take action while this is still containable, ban travel and entry to Ebola infected nations immediately!