Health workers in protective suits stand near a window at an isolation ward on the sixth floor of Madrid's Carlos III Hospital October 12, 2014. Teresa Romero, 44, the Spanish nurse infected with Ebola was conscious and sitting unaided on Saturday, as three more people joined 12 others hospitalized in Madrid to be monitored for signs of the deadly disease. None of the 15 others still under observation has been diagnosed with Ebola so far, though the Spanish government is under fire for its handling both of Romero's case and the threat of a wider outbreak of the disease. REUTERS/Paul Hanna (SPAIN - Tags: HEALTH DISASTER) 

Javier Limon Romero, the husband of Spanish nurse Teresa Romero Ramos who contracted Ebola, leans out his window to see a Spanish air force flyover that was participating in Spain's national day ceremonies from the window of his room at an isolation ward on the fifth floor of Madrid's Carlos III Hospital October 12, 2014. Teresa Romero, 44, the Spanish nurse infected with Ebola was conscious and sitting unaided on Saturday, as three more people joined 12 others hospitalized in Madrid to be monitored for signs of the deadly disease. None of the 15 others still under observation has been diagnosed with Ebola so far, though the Spanish government is under fire for its handling both of Romero's case and the threat of a wider outbreak of the disease. REUTERS/Paul Hanna (SPAIN - Tags: HEALTH DISASTER) 

A health worker wearing a protective suit stands near a window at an isolation ward on the sixth floor of Madrid's Carlos III Hospital October 12, 2014. Teresa Romero, 44, the Spanish nurse infected with Ebola was conscious and sitting unaided on Saturday, as three more people joined 12 others hospitalized in Madrid to be monitored for signs of the deadly disease. None of the 15 others still under observation has been diagnosed with Ebola so far, though the Spanish government is under fire for its handling both of Romero's case and the threat of a wider outbreak of the disease. REUTERS/Paul Hanna (SPAIN - Tags: HEALTH DISASTER) 

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 (SPAIN - Tags: HEALTH DISASTER TPX IMAGES OF THE DAY) 

People protest against the killing of Excalibur, the dog of Spanish nurse Teresa Romero who is the first person to contract Ebola outside of Africa, and the handling of the Ebola crisis, in Madrid October 11, 2014. Health authorities on Thursday put down the dog, a labrador-type breed, who lived with the nurse and her husband in a suburban Madrid flat, saying it posed a biological risk and there was evidence dogs could carry the virus. Sixteen people were being monitored in a Madrid hospital for signs of Ebola on Saturday, with patient numbers rising as the Spanish government tries to contain recriminations over how it has handled the first outbreak of the disease outside Africa. The text on the placards reads, "All with Excalibur" (L) and "All with Teresa". REUTERS/Andrea Comas (SPAIN - Tags: HEALTH DISASTER CIVIL UNREST ANIMALS POLITICS) 

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 

Health workers protest as Spanish Prime Minister Mariano Rajoy (not pictured) finishes his visit to 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. REUTERS/Susana Vera 

Health workers protest as Spanish Prime Minister Mariano Rajoy (not pictured) finishes his visit to 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. REUTERS/Susana Vera 

A police officer blocks a health worker from going forward as she protests while Spanish Prime Minister Mariano Rajoy (not pictured) finishes his visit to 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. REUTERS/Susana Vera 

Spanish Prime Minister Mariano Rajoy (C) is flanked by Madrid's regional President Ignacio Gonzalez (L) and Rafael Perez-Santamarina, manager of Madrid's Carlos III hospital, as he gives a statement to the media outside the 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. REUTERS/Susana Vera 

Spanish Prime Minister Mariano Rajoy walks out of Madrid's Carlos III hospital to give a statement to the media 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. REUTERS/Susana Vera 

Medical workers in protective clothing work in a room on the sixth floor of the Carlos III hospital, where Spanish nurse Teresa Romero Ramos who contracted Ebola is hospitalised, in Madrid, 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. 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 (SPAIN - Tags: HEALTH DISASTER TPX IMAGES OF THE DAY) 

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 woman looks through the window of a ward where she is being kept isolated in as it rains outside at Madrid's Carlos III Hospital October 9, 2014. The health of a Spanish nurse with Ebola 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 

Workers in protective clothing head towards the entrance of the apartment building of a nurse who contracted Ebola, in Alcorcon, outside Madrid, October 8, 2014. 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 a Spanish nurse had caught the disease in Madrid. REUTERS/Susana Vera 

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 

Spanish civil guards stand outside a hospital in Alcorcon, outside Madrid, where a Spanish nurse infected with Ebola was being readied for transfer to a different hospital early October 7, 2014. The Spanish nurse has become the first person to contract Ebola outside of Africa, casting doubt over measures taken in Spain to control the potential spread of the deadly disease. The nurse had helped to treat two priests who contracted Ebola in Africa and were repatriated to Spain. Some 30 other health workers and those who came in contact with her are now being monitored for symptoms. REUTERS/Sergio Perez 

A medical worker in protective gear stands next to a special stretcher carrying a Spanish nurse who was infected by Ebola, outside Alcorcon's hospital, near Madrid, early October 7, 2014. A Spanish nurse has become the first person to contract Ebola outside of Africa, casting doubt over measures taken in Spain to control the potential spread of the deadly disease. REUTERS/Sergio Perez 

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 hospitalizsd 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 vacation, was currently being treated with drip using antibodies from previous infected patients. 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 

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 vacation, was currently being treated with drip using antibodies from previous infected patients. REUTERS/Andrea Comas 

A doctor walks outside Carlos III hospital in Madrid, where a Spanish nurse who contracted Ebola is being treated, 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. REUTERS/Andrea Comas 

An entrance to the Carlos III hospital, where a Spanish nurse who contracted Ebola is being treated, is seen in Madrid October 7, 2014. The Spanish nurse has become the first person to contract Ebola outside of Africa, casting doubt over measures taken in Spain to control the potential spread of the deadly disease. The nurse had helped to treat two priests who contracted Ebola in Africa and were repatriated to Spain. Some 30 other health workers and those who came in contact with her are now being monitored for symptoms. REUTERS/Andrea Comas (SPAIN - Tags: HEALTH SOCIETY DISASTER) 

Spanish Director General of Public Health Maria Mercedes Vinuesa stands next to a Spanish national flag as she arrives to give a briefing on the person who has contracted Ebola during a health commission at Madrid's parliament October 7, 2014. A Spanish nurse has become the first person to contract Ebola outside of Africa, casting doubt over measures taken in Spain to control the potential spread of the deadly disease. REUTERS/Susana Vera 

Jose Ramon Arribas, Infection Unit Chief at Madrid's La Paz-Carlos III hospital, reacts during a news conference in Madrid October 7, 2014. Four people have been hospitalised in Spain to try to stem the spread of Ebola after a Spanish nurse became the first person in the world known to have contracted the virus outside of Africa, health authorities said on Tuesday. The nurse, who tested positive for the virus on Monday, her husband, who is showing no symptoms of the disease, and two other people are being closely monitored in hospital, health officials told a news conference in Madrid. REUTERS/Susana Vera 

Spanish Health Minister Ana Mato looks down at the start of a meeting with members of Madrid's regional health office at the Spanish Health Ministry in Madrid October 7, 2014. Four people have been hospitalised in Spain to try to stem the spread of Ebola after the Spanish nurse became the first person in the world known to have contracted the virus outside of Africa, health authorities said on Tuesday. The nurse, who tested positive for the virus on Monday, her husband, who is showing no symptoms of the disease, and two other people are being closely monitored in hospital, health officials told a news conference in Madrid. They also said the nurse, who did not leave Madrid during her vacation, was currently being treated with drip using antibodies from previous infected patients. REUTERS/Susana Vera 

Spain's Health Minister Ana Mato (C) arrives, flanked by unidentified officials, for a news conference in Madrid, October 6, 2014. Spanish health officials on Monday said that a Spanish nurse who treated a priest repatriated to Madrid with Ebola last month, and who died of the disease, had also been infected. Mato told a news conference that an emergency protocol had been put in place and authorities were working to establish the source of the contagion, in the first case of Ebola being contracted outside of West Africa. REUTERS/Sergio Perez 

A hearse carries the coffin of Spanish priest Miguel Pajares, 75, from Carlos III Hospital in Madrid August 12, 2014. Pajares the first European infected by a strain of Ebola that has killed more than 1,000 people in West Africa, has died in hospital in Madrid, a spokeswoman for the city's health authorities said on Tuesday. REUTERS/Juan Medina