The CDC says Amber Vinson may have had symptoms of Ebola as early as last Friday, four days before she went to the hospital. That change in timeline means hundreds more could have been exposed. On Friday, Vinson flew from Dallas to Cleveland. On Monday, she flew back to Dallas. Both planes were full of passengers.
Officials are now trying to contact all of those passengers. Officials still don't know how the two infected nurses got Ebola in the first place.
A Dallas nurse who says she's putting her job on the line says Texas Health Presbyterian Hospital left nurses unprepared to handle Ebola.
CNN's Ed Lavandera has more OutFront.