Members of the Protect HazMat team prepare to clear the contents of the apartment of a health worker who was infected with the Ebola virus at Texas Health Presbyterian Hospital in Dallas, Texas October 13, 2014. The nurse, whose name has not been released by officials, has been identified by friends and family and in media reports as Nina Pham, 26. Reuters independently verified her identity with a Sunday school teacher at the church where her family worships and through a public records check of her address. REUTERS/Jaime R. Carrero (UNITED STATES - Tags: HEALTH) 

Workers unload containers as officials prepare to empty the apartment of a health worker who was infected with the Ebola virus at Texas Health Presbyterian Hospital in Dallas, Texas October 13, 2014. The nurse, whose name has not been released by officials, has been identified by friends and family and in media reports as Nina Pham, 26. Reuters independently verified her identity with a Sunday school teacher at the church where her family worships and through a public records check of her address. REUTERS/Jaime R. Carrero (UNITED STATES - Tags: HEALTH) 

A member of the Protect HazMat team carries protective clothing and supplies near the apartment of the health worker who was infected with the Ebola virus at Texas Health Presbyterian Hospital in Dallas, Texas October 13, 2014. The nurse, whose name has not been released by officials, has been identified by friends and family and in media reports as Nina Pham, 26. Reuters independently verified her identity with a Sunday school teacher at the church where her family worships and through a public records check of her address. REUTERS/Jaime R. Carrero (UNITED STATES - Tags: HEALTH) 

Members of the Protect HazMat team prepare to enter the apartment of the health worker who was infected with the Ebola virus at Texas Health Presbyterian Hospital in Dallas, Texas October 13, 2014. The nurse, whose name has not been released by officials, has been identified by friends and family and in media reports as Nina Pham, 26. Reuters independently verified her identity with a Sunday school teacher at the church where her family worships and through a public records check of her address. REUTERS/Jaime R. Carrero (UNITED STATES - Tags: HEALTH) 

A member of the CG Environmental HazMat team disinfects the entrance to the residence of a health worker at the Texas Health Presbyterian Hospital who has contracted Ebola in Dallas, Texas, October 12, 2014. The infected worker, identified as a woman but not named by authorities as they announced the case on Sunday, is believed to be the first person to contract the disease in the United States. REUTERS/Jaime R. Carrero (UNITED STATES - Tags: DISASTER HEALTH) 

A metal barrel containing contaminated belongings of a health worker at the Texas Health Presbyterian Hospital who has contracted Ebola is in front of the health worker's residence in Dallas, Texas, October 12, 2014. The infected worker, identified as a woman but not named by authorities as they announced the case on Sunday, is believed to be the first person to contract the disease in the United States. REUTERS/Jaime R. Carrero (UNITED STATES - Tags: DISASTER HEALTH TPX IMAGES OF THE DAY) 

Dallas police officers put up tape to restrict entrance to the residence of a health worker at the Texas Health Presbyterian Hospital who has contracted Ebola in Dallas, Texas, October 12, 2014. The infected worker, identified as a woman but not named by authorities as they announced the case on Sunday, is believed to be the first person to contract the disease in the United States. REUTERS/Jaime R. Carrero (UNITED STATES - Tags: HEALTH DISASTER) 

Emergency vehicles are at the apartment of a health worker who has tested positive for Ebola in Dallas, Texas, October 12, 2014. A health worker in Texas at the hospital where the first person diagnosed with Ebola in the United States died last week has tested positive for the deadly virus in a preliminary test, the state's health department said on Sunday. REUTERS/Lisa Maria Garza (UNITED STATES - Tags: DISASTER HEALTH) 

A Dallas police officer and a Dallas Fire Department Community officer, Shawn Williams (R) stand in front of the residence of a health worker at the Texas Health Presbyterian Hospital who has contracted Ebola in Dallas, Texas, October 12, 2014. The infected worker, identified as a woman but not named by authorities as they announced the case on Sunday, is believed to be the first person to contract the disease in the United States. REUTERS/Jaime R. Carrero (UNITED STATES - Tags: DISASTER HEALTH) 

U.S. President Barack Obama gets an update on the response to the Ebola diagnosis in Dallas during a call with U.S. Health and Human Services Secretary Sylvia Burwell, in the Oval Office in Washington October 12, 2014. REUTERS/Jonathan Ernst (UNITED STATES - Tags: POLITICS HEALTH) 

Nowai Korkoyah, the mother of Thomas Eric Duncan, the first patient diagnosed with Ebola on U.S. soil, attends a news conference with Reverend Jesse Jackson (R) in Dallas, Texas October 7, 2014. Duncan remains in critical condition, he is on a ventilator and receiving kidney dialysis, the Dallas hospital treating him said on Tuesday. At left is Duncan's nephew Josephus Weeks. REUTERS/Jim Young 

A worker in a hazardous material suit removes the contents of the apartment unit where a man diagnosed with the Ebola virus was staying in Dallas, Texas, October 6, 2014. Thomas Eric Duncan, the first person to develop Ebola in the United States, was struggling to survive at a Dallas hospital heightening concerns of the worst Ebola epidemic on record and has killed more than 3,400 people. REUTERS/Jim Young (UNITED STATES - Tags: HEALTH SOCIETY DISASTER) 

A general view of The Ivy Apartments in Dallas, October 1, 2014. REUTERS/Mike Stone