ABC News chief health and medical editor Dr. Richard Besser recently returned from the Ebola hot zone in Liberia. He said Sunday morning that if the new Ebola case reported in Dallas is confirmed, it is a "very concerning" development.
"Public health officials will need to investigate to see how this exposure occurred," Besser said."Was this a worker who had contact with [Thomas Eric] Duncan before it was known he was infected with Ebola or after? If after, it raises big questions."
He said "a very wide net" needs to be cast for anyone who has come into contact with Duncan, who died at Texas Health Presbyterian Hospital in Dallas on Wednesday, the first patient in the United States to be diagnosed with Ebola.
Besser said he does not agree with the Centers for Disease Control, which says any U.S. hospital can safely care for an Ebola patient.
"To do it safely, health care workers need to train and practice using protective equipment like they have been doing at the Emory and Nebraska facilities," he said, referring to special biocontainment units at Emory University Hospital in Atlanta — where Fort Worth physician Kent Brantly was treated for Ebola exposure; and the Nebraska Medical Center in Omaha, where an NBC photojournalist is currently being cared for. "I would never have gone into an Ebola ward in Africa without being dressed and decontaminated by experts — health care workers here should expect no less."