Virulence vs infectivity....
Ebola is actually pretty hard to spread. The reason it's spreading so fast in Africa is that the locals reject medical advice and precautions as witchcraft and continue to do things like eat roadkill and rub the bodies of their deceased loved ones.
The public and the media (whipping up a good story) are mistakenly correlating the striking pathogenicity and mortality rate of ebola with infectivity. In layman's terms, you are not likely to get it, even in africa, but if you do you aren't likely to survive it. The same is true with Rabies in this country!
The truth of the matter is there are infectious diseases in africa that kill many times more people and are much more likely to be transmitted but nobody is talking about them or suggesting that travel be limited because of the thousands upon thousands that contract the disease only a small percentage die from it. Keep in mind that Ebola is not the only viral hemorrhagic fever out there. There is Marburg, another filovirus similar to ebola that was actually named for an outbreak in the developed world (marburg germany). Lassa Fever that kills thousands of africans annually. Then there is also dengue fever, rift valley fever, crimean-congo hemorrhagic fever, etc.
Bottom line is we do need to take this seriously and our infection control agencies are doing just that but it is being blown WAY out of proportion with one US case being acquired in africa and transported to the US. The likelihood of an outbreak here is very, very slim and everybody just needs to calm down.