I should say that I have been potentially exposed, and I live in a very out of the way place. I won't trace the steps but it leads to Liberia very directly. I am not expecting anything of course, and we hopefully would have heard if she developed the disease. But that is how easy it is to spread. And I do not believe for a minute that it can't be spread until symptoms are active..at what point do you determine that? There is a whole lot of grey area there. I work for a university and we are under orders now to report any trips to high-risk places and there is a quarantine we are supposed to follow I think..I did not read it too carefully.