It's less surprising if you factor in that the other cases were known to be Ebola before being medevacuated to one of the 4 hospitals that are set up for these

It's less surprising if you factor in that the other cases were known to be Ebola before being medevacuated to one of the 4 hospitals that are set up for these sorts of diseases. Presumably they're more careful, and they had advance warning to get their acts together.