Texas nurse Amber Vinson (L) steps from an ambulance at Emory University Hospital in Atlanta, Georgia October 15, 2014. Vinson, the second Texas nurse who had contracted Ebola was flown to Emory Wednesday after being transferred from Texas Presbyterian Hospital. She had treated Liberian patient Thomas Eric Duncan, who died of Ebola and was the first patient diagnosed with the virus in the United States. REUTERS/Jerry Jordan (UNITED STATES - Tags: HEALTH DISASTER TPX IMAGES OF THE DAY)