I hope this turns out to be an overreaction, because the US would never close the borders--it would be an admission that they were wrong.
http://www.news1130.com/2014/08/08/doctors-near-toronto-say-patient-has-ebola-like-symptoms/
http://www.news1130.com/2014/08/08/doctors-near-toronto-say-patient-has-ebola-like-symptoms/