FILE - A sign points to the entrance to the emergency room at Texas Health Presbyterian Hospital Dallas, where U.S. Ebola patient Thomas Eric Duncan was being treated, in this Oct. 8, 2014 file photo, in Dallas. Health officials said Sunday Oct. 12, 2014 a health care worker at Texas Health Presbyterian Hospital who provided care for Eric Duncan has tested positive for Ebola in a preliminary test "confirmatory testing will be conducted by the Centers for Disease Control and Prevention in Atlanta." (AP Photo/LM Otero, File)

Can all US hospitals safely treat Ebola?

Another federal official has suggested it was worth rethinking whether to send patients to one of the specialized units set up to deal with …