I can't think of a more dangerous place for this desease to spread. Their medical staffs are woefully understaffed and can only handle basic health care.
When one thinks of all the bodily fluids that the prisoners are exposed to, on a daily basis, whether it be rape, beatings, stabbings and homosexual activity, it could quickly become endemic.
It is possible that prisons could be a breeding ground for Abola and, as prisoners leave the system, spread it into general population.
But I'm sure the 'don't worry about it' CDC is on top of that too. /sarc