An unidentified man gestures as he shows what is believed to be his body temperature (36.1 degree Celsius or 97 degree Fahrenheit) from the window of his room at an isolation ward on the fifth floor at Madrid's Carlos III Hospital, where Spanish nurse Teresa Romero Ramos who contracted Ebola is hospitalized, October 11, 2014. Seven more people were admitted to a specialist isolation unit at the Carlos III hospital on Thursday, taking to 14 the number of people now under observation or being treated there, including Romero's husband. REUTERS/Sergio Perez 

International Monetary Fund (IMF) Managing Director Christine Lagarde points to a button saying "Isolate Ebola, Not Countries" as she speaks during the IMFC news conference during the World Bank/IMF Annual Meeting in Washington October 11, 2014. REUTERS/Joshua Roberts 

Gil Kerlikowske, (R ) Commissioner of U.S. Customs and Border Protection, speaks to the media on the implementation at JFK of enhanced screening of travelers arriving from Ebola affected countries, at the International JFK airport in New York, October 11, 2014. Medical teams at New York's John F. Kennedy Airport begin more aggressive screening of travelers from three West African countries for signs of Ebola infection, as the United States steps up efforts to staunch the spread of the deadly virus. REUTERS/Eduardo Munoz 

Health workers shout and throw gloves at the convoy of Spanish Prime Minister Mariano Rajoy after his visit to Madrid's Carlos III hospital, October 10, 2014. Seven people turned themselves in late on Thursday to an Ebola isolation unit at this hospital in Madrid where Teresa Romero, the nurse who became the first person to contract Ebola outside Africa, lay gravely ill. A hospital spokeswoman said there were now 14 people in the isolation unit on its sealed-off sixth floor, including Romero, her husband, and health workers who had cared for Romero since she was admitted on Monday. REUTERS/Andrea Comas 

Javier Limon Romero, the husband of Spanish nurse Teresa Romero Ramos who contracted Ebola, stretches while looking out of the window of a ward he is being kept isolated in, at Madrid's Carlos III hospital, October 10, 2014. Seven people turned themselves in late on Thursday to an Ebola isolation unit in Madrid where Teresa Romero, the nurse who became the first person to contract Ebola outside Africa, lay gravely ill. A hospital spokeswoman said there were now 14 people in the isolation unit on its sealed-off sixth floor, including Romero, her husband, and health workers who had cared for Romero since she was admitted on Monday. REUTERS/Andrea Comas 

Health workers attend a protest outside La Paz Hospital, calling for Spain's Health Minister Ana Mato to resign after a Spanish nurse contracted Ebola, in Madrid October 7, 2014. Four people, including the nurse who tested for Ebola on Monday, were hospitalised and being monitored over suspicion of potential contagion of the deadly disease, Spain's health authorities said on Tuesday. Officials for Madrid's health system told a news conference those hospitalised included the nurse's husband, a traveller from one affected country and another health worker. They also said the nurse, who did not leave Madrid during her vacations, was currently being treated with drip using antibodies from previous infected patients. REUTERS/Andrea Comas 

Javier Limon, the husband of Spanish nurse Teresa Romero Ramos who contracted Ebola, looks out of the window of a ward he is being kept isolated in, at Madrid's Carlos III hospital, October 9, 2014. The health of Teresa Romero Ramos worsened on Thursday and four other people were put into isolation in Madrid, while the government rejected claims that its methods for dealing with the disease weren't working, and blamed human error. REUTERS/Susana Vera 

A demonstrator is pushed by a Spanish riot police officer as a veterinarian van, apparently carrying Excalibur, the dog of the Spanish nurse who contracted Ebola, leaves from her apartment complex in Alcorcon, outside Madrid, October 8, 2014. Madrid regional authorities said they would euthanize the nurse's dog Excalibur to avoid possible contagion, sparking an outcry by animal rights activists to save the dog. REUTERS/Sergio Perez 

Excalibur, the dog of the Spanish nurse who contracted Ebola, barks from her apartment's balcony in Alcorcon, outside Madrid, October 8, 2014. Madrid regional authorities said they would euthanize the nurse's dog Excalibur to avoid possible contagion, sparking an outcry by animal rights activists to save the dog. Spanish health authorities said on Wednesday that another person being monitored in Madrid for Ebola had tested negative for the disease. The man, a Spaniard who had travelled from Nigeria, was one of several people hospitalised after authorities confirmed on Monday that the Spanish nurse had caught the disease in Madrid. REUTERS/Susana Vera 

A soldier goes through the decontamination process with U.S. Army soldiers from the 101st Airborne Division (Air Assault), who are earmarked for the fight against Ebola, take part in training before their deployment to West Africa, at Fort Campbell, Kentucky October 9, 2014. The U.S. military is ramping up its response to the Ebola outbreak in West Africa, where it has already killed more than 3,400 people in Liberia, Sierra Leone and Guinea. REUTERS/Harrison McClary 

U.S. soldiers have their temperatures taken upon arrival at Roberts International airport outside Monrovia, October 9, 2014. REUTERS/Daniel Flynn 

People look from the window of a quarantined hotel in Skopje October 9, 2014. A British man showing symptoms of the Ebola virus died in Macedonia on Thursday and authorities said they had sealed off the hotel where he stayed, keeping another Briton and hotel staff inside. REUTERS/Ognen Teofilovski 

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 

Neighboring people watch a man in a hazardous material suit work on cleaning 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 

A worker in a hazardous material suit looks out from the apartment unit where a man diagnosed with the Ebola virus was staying in Dallas, Texas, October 5, 2014. Thomas Eric Duncan, the first person diagnosed with Ebola in the United States, was fighting for his life at a Dallas hospital on Sunday and appeared not to be receiving any of the experimental medicines for the virus, a top U.S. medical official said. REUTERS/Jim Young 

Medical staff members wearing sealed protective suits work during the arrival of an Ebola patient at the Universitaetsklinikum Frankfurt (University Hospital Frankfurt) in Frankfurt, October 3, 2014. The federal government of the German federal state of Hesse announced that the University Hospital Frankfurt would treat the non-European person who arrived at Frankfurt airport early in the morning on Friday. REUTERS/Ralph Orlowski 

A health worker checks the temperature of a woman entering Mali from Guinea at the border in Kouremale, Mali October 2, 2014. REUTERS/Joe Penney 

The names of trainee health workers are seen written on their protective suits at a World Health Organization (WHO) training session in Freetown, Sierra Leone September 30, 2014. REUTERS/Umaru Fofana 

A health worker brings a woman suspected of having contracted the Ebola virus to an ambulance in Monrovia, Liberia, September 15, 2014. REUTERS/James Giahyue 

Health workers remove the body of Prince Nyentee, a 29-year-old man whom local residents said died of Ebola virus in Monrovia, September 11, 2014. REUTERS/James Giahyue