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) 

An ambulance transporting Amber Joy Vinson, a U.S. nurse who has Ebola, arrives at Emory University Hospital in Atlanta, Georgia October 15, 2014. Vinson, the second Texas nurse who had contracted Ebola, was sent to Emory on 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/Tami Chappell (UNITED STATES - Tags: HEALTH DISASTER TRANSPORT) 

An ambulance transporting Amber Joy Vinson, a U.S. nurse who has Ebola, arrives at Emory University Hospital in Atlanta, Georgia October 15, 2014. Vinson, the second Texas nurse who had contracted Ebola, was sent to Emory on 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/Tami Chappell (UNITED STATES - Tags: HEALTH DISASTER TRANSPORT) 

An ambulance transporting Amber Joy Vinson, a U.S. nurse who has Ebola, arrives with a security detail at Emory University Hospital in Atlanta, Georgia October 15, 2014. Vinson, the second Texas nurse who had contracted Ebola, was sent to Emory on 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/Tami Chappell (UNITED STATES - Tags: HEALTH DISASTER TRANSPORT) 

Members of the emergency response team with Protect Environmental Services unloads plastic barrels to be used to collect apartment contents from where a second Texas nurse who tested positive for Ebola resides in Dallas, Texas, October 15, 2014. Amber Vinson, 29, was isolated immediately after reporting a fever on Tuesday, Texas Department of State Health Services officials said. REUTERS/Jaime R. Carrero (REUTERS - Tags: DISASTER HEALTH) 

Members of the emergency response team with Protect Environmental Services carry plastic barrels to be used to collect apartment contents from where a second Texas nurse who tested positive for Ebola resides in Dallas, Texas, October 15, 2014. Amber Vinson, 29, was isolated immediately after reporting a fever on Tuesday, Texas Department of State Health Services officials said. REUTERS/Jaime R. Carrero (REUTERS - Tags: DISASTER HEALTH) 

An emergency response team with Protect Environmental arrive at the Village Apartment complex where a second Texas nurse who tested positive for Ebola resides in Dallas, Texas, October 15, 2014. Amber Vinson, 29, was isolated immediately after reporting a fever on Tuesday, Texas Department of State Health Services officials said. REUTERS/Jaime R. Carrero (REUTERS - Tags: DISASTER HEALTH) 

A private security officer checks the ID of a passerby (R) at the Village Apartment complex where a second Texas nurse who tested positive for Ebola resides in Dallas, Texas, October 15, 2014. Amber Vinson, 29, was isolated immediately after reporting a fever on Tuesday, Texas Department of State Health Services officials said. REUTERS/Jaime R. Carrero (REUTERS - Tags: DISASTER HEALTH)