This patient needs to be tested again in 3 days, to be considered totally clear. The tests - early on in symptomatic patients - often come back negative, even when there's enough virus to raise a fever -- it's not enough to be considered positive on the test. A false negative, in other words.
Ebola outbreaks start out very, very slowly. W. Africa's started in December '13; MSF didn't arrive and wasn't alerted to a problem until March '14.
But I don't think we'll see the attention to these cases, nationally, that we saw with the NYC doc or Duncan, in the future. Doesn't mean there won't be problems; they'll be considered local issues now. Until there is a true, local outbreak.
Ya can't let your guard down on this. It'll sneak up on ya.