Park Record Media Center

Members of Doctors Without Borders (MSF) wearing protective gear walk outside the isolation ward of the Donka Hospital, on July 23, 2014 in Conakry. A Liberian man has been hospitalised in Lagos with Ebola-like symptoms, but it is not yet clear if he is infected with the killer virus, Nigerian officials said on July 24. Ebola first emerged in 1976 in what is now the Democratic Republic of Congo, and is named after a river in that country. (CELLOU BINANI/AFP/Getty Images) ( Par7938508 )

This photo provided by the CDC shows an ebola Virus. U.S. health officials are monitoring the Ebola outbreak in Africa but say the risk of the deadly germ spreading to the United States is remote. (AP Photo/CDC) ( Ebola-CDC brief )

In this 2014 photo provided by the Samaritan's Purse aid organization, Dr. Kent Brantly, left, treats an Ebola patient at the Samaritan's Purse Ebola Case Management Center in Monrovia, Liberia. On Saturday, July 26, 2014, the North Carolina-based aid organization said Brantly tested positive for the disease and was being treated at a hospital in Monrovia. (AP Photo/Samaritan's Purse) ( Ebola American Doctor )

Dr. Kent Brantly is shown in this 2013 photo provided by JPS Health Network. A relief group official says Brantly is one of two American aid workers that have tested positive for the Ebola virus while working to combat an outbreak of the deadly disease at a hospital in Liberia. A spokesman said both Americans have been isolated and are under intensive treatment.(AP Photo/JPS Health Network) ( Ebola American Doctor )

Members of Doctors Without Borders (MSF) put on protective gear at the isolation ward of the Donka Hospital, on July 23, 2014 in Conakry. A Liberian man has been hospitalised in Lagos with Ebola-like symptoms, but it is not yet clear if he is infected with the killer virus, Nigerian officials said on July 24. Ebola first emerged in 1976 in what is now the Democratic Republic of Congo, and is named after a river in that country. (CELLOU BINANI/AFP/Getty Images) ( Par7938506 )

Members of Doctors Without Borders (MSF) wear protective gear at the isolation ward of the Donka Hospital in Conakry on July 23, 2014. A Liberian man has been hospitalised in Lagos with Ebola-like symptoms, but it is not yet clear if he is infected with the killer virus, Nigerian officials said on July 24. A regional centre was set up in Guinea to coordinate the response to the worst-ever outbreak of Ebola that has killed hundreds of people in west Africa, the World Health Organisation said on July 11. (CELLOU BINANI/AFP/Getty Images) ( Par7938510 )

In this Monday, July 15, 2014 photo, a woman, center, walks near the Arwa clinic, center rear, that was closed after the clinic doctor got infected by the Ebola virus in the capital city of Freetown, Sierra Leone. Ebola, a hemorrhagic fever that can cause its victims to bleed from the ears and nose, had never before been seen in this part of West Africa where medical clinics are few and far between. The disease has turned up in at least two other countries - Liberia and Sierra Leone - and more than 530 deaths have been attributed to the outbreak that is now the largest on record. (AP Photo/Youssouf Bah) ( Sierra Leone West Africa Ebola )

A 10-year-old boy is given a medical blouse after being taken out of quarantine following his mother's death caused by the ebola virus, in the Christian charity Samaritan's Purse Ebola treatment center, at the ELWA hospital in the Liberian capital Monrovia, on July 24, 2014. A US doctor battling West Africa's Ebola epidemic has himself fallen sick with the disease in Liberia, Samaritan's Purse said on July 27. AFP PHOTO / ZOOM DOSSO ( LIBERIA-US-HEALTH-DISEASE-EPIDEMIC-EBOLA )

In this photo taken on Monday, July 28, 2014, people hang out in a street under a banner which warns people to be cautious about Ebola, in Monrovia, Liberia. Two American aid workers in Liberia have tested positive for the virus and are being treated there. U.S. health officials said Monday that the risk of the deadly germ spreading to the United States is remote. (AP Photo/Jonathan Paye-Layleh) ( Liberia West Africa Ebola )

A picture taken on July 24, 2014 shows staff of the Christian charity Samaritan's Purse putting on protective gear in the ELWA hospital in the Liberian capital Monrovia. An American doctor battling West Africa's Ebola epidemic has himself fallen sick with the disease in Liberia, Samaritan's Purse said on July 27. AFP PHOTO / ZOOM DOSSO ( LIBERIA-US-HEALTH-DISEASE-EPIDEMIC-EBOLA )

A picture taken on July 24, 2014 shows protective gear including boots, gloves, masks and suits, drying after being used in a treatment room in the ELWA hospital in the Liberian capital Monrovia. An American doctor battling West Africa's Ebola epidemic has himself fallen sick with the disease in Liberia, Christian charity Samaritan's Purse said on July 27. AFP PHOTO / ZOOM DOSSO ( LIBERIA-US-HEALTH-DISEASE-EPIDEMIC-EBOLA )

A picture taken on July 24, 2014 shows a staff member of the Christian charity Samaritan's Purse wearing protective whilst entering a room where patients are kept in the ELWA hospital in the Liberian capital Monrovia. An American doctor battling West Africa's Ebola epidemic has himself fallen sick with the disease in Liberia, Samaritan's Purse said on July 27. AFP PHOTO / ZOOM DOSSO ( LIBERIA-US-HEALTH-DISEASE-EPIDEMIC-EBOLA )

A pharmacist searches for drugs in a pharmacy in Lagos on July 26, 2014. Nigeria was on alert against the possible spread of Ebola on July 26, a day after the first confirmed death from the virus in Lagos, Africa's biggest city and the country's financial capital. The health ministry said Friday that a 40-year-old Liberian man died at a private hospital in Lagos from the disease, which has now killed more than 650 people in four west African countries since January. (PIUS UTOMI EKPEI/AFP/Getty Images) ( Par7940022 )

A sign at Southside Church of Christ offers support for Dr. Kent Brantly who is being treated for Ebola in Liberia, on Sunday, July 27, 2014, in Fort Worth, Texas. The doctor has been treating Ebola patients for the Samaritan's Purse organization. (AP Photo/The Fort Worth Star-Telegram, Ben Noey Jr.) ( Ebola Doctor )

Dr. David Mcray speaks about his friend and colleague Dr. Kent Brantly during a news conference Monday, July 28, 2014, in Fort Worth, Texas. Brantly is one of two American aid workers that have tested positive for the Ebola virus while working to combat an outbreak of the deadly disease at a hospital in Liberia. (AP Photo/LM Otero) ( Ebola American Doctor )

In this undated family photo, Patrick Sawyer is shown with his daughter Ava at their home in Coon Rapids. Sawyer died from Ebola after traveling from his native Liberia to Nigeria. (AP Photo) ( West Africa Ebola )

A picture taken on July 24, 2014 shows a staff member of the Christian charity Samaritan's Purse spraying product as he treats the premises outside the ELWA hospital in the Liberian capital Monrovia. An American doctor battling West Africa's Ebola epidemic has himself fallen sick with the disease in Liberia, Samaritan's Purse said on July 27. AFP PHOTO / ZOOM DOSSO ( LIBERIA-US-HEALTH-DISEASE-EPIDEMIC-EBOLA )

Lagos health commissioner Jide Idris (C) flanked by director of Nigerian Centre for Disease Control, Professor Abdulsalam Nasidi (L) and special adviser to Lagos State governor Yewande Adeshina, speaks about Ebola outbreak during a briefing in Lagos on July 28, 2014. Nigeria was on alert against the possible spread of Ebola on Saturday, a day after the first confirmed death from the virus in Lagos, Africa's biggest city and the country's financial capital. The health ministry said Friday that a 40-year-old Liberian man died at a private hospital in Lagos from the disease, which has now killed more than 650 people in four west African countries since January -- the deadliest outbreak in history. (PIUS UTOMI EKPEI/AFP/Getty Images) ( Par7940950 )

A worker loads material including protection gear for the NGO Medecins sans Frontieres (Doctors without borders-MSF) at the airport of Conakry on March 29, 2014. Guinea raced Saturday to contain a deadly Ebola epidemic spreading from its southern forests to the capital Conakry, as neighbouring Senegal closed its border. (CELLOU BINANI/AFP/Getty Images) ( Par7837802 )

A man reads a newspaper featuring a front page story on the death of Liberian diplomat Patrick Sawyer (pictured with his wife Decontee) who died of the Ebloa virus in Lagos on July 30, 2014. Nigeria is on alert against the possible spread of Ebola after the first confirmed death from the virus in Lagos, Africa's biggest city and the country's financial capital. The victim, who worked for the Liberian government, collapsed at Lagos international airport after arriving on a flight from Monrovia via the Togolese capital Lome, according to the Nigerian government. Doctors Without Borders (MSF) warned that the crisis gripping Guinea, Liberia and Sierra Leone would only get worse and could not rule out it spreading to other countries. (PIUS UTOMI EKPEI/AFP/Getty Images) ( Par7941559 )

Workers and medical staff listen on March 31, 2014 to a doctor as patients' relatives wait outside the security perimeter at the isolation ward of the Donka hospital in Conakry, Guinea. Aid organisation Doctors Without Borders said on March 31 an Ebola outbreak suspected of killing at least 78 people in Guinea was an "unprecedented epidemic" that had spread across the west African nation. (CELLOU BINANI/AFP/Getty Images) ( Par7839988 )

Members of the Guinean Red Cross stick information concerning the Ebola virus during an awareness campaign on April 11, 2014 in Conakry. Guinea has been hit by the most severe strain of the virus, known as Zaire Ebola, which has had a fatality rate of up to 90 percent in past outbreaks, and for which there is no vaccine, cure or even specific treatment. The World Health Organization (WHO) has described west Africa's first outbreak among humans as one of the most challenging since the virus emerged in 1976 in what is now the Democratic Republic of Congo. (CELLOU BINANI/AFP/Getty Images) ( Par7852924 )

A picture taken on June 28, 2014 shows a member of Doctors Without Borders (MSF) putting on protective gear at the isolation ward of the Donka Hospital in Conakry, where people infected with the Ebola virus are being treated. The World Health Organization has warned that Ebola could spread beyond hard-hit Guinea, Liberia and Sierra Leone to neighbouring nations, but insisted that travel bans were not the answer. To date, there have been 635 cases of haemorrhagic fever in Guinea, Liberia and Sierra Leone, most confirmed as Ebola. A total of 399 people have died, 280 of them in Guinea. (CELLOU BINANI/AFP/Getty Images) ( Par7919791 )

Health workers wearing protective suits walk in an isolation center for people infected with Ebola at Donka Hospital in Conakry on April 14, 2014. Guinea's Foreign Minister Francois Fall said on April 14 that the west African country had brought the spread of the deadly Ebola virus under control after more than 100 people have died. The outbreak is one of the most deadly, with 168 cases "clinically compatible" with Ebola virus disease reported, including 108 deaths, the World Health Organization (WHO) said in its latest update on April 14. (CELLOU BINANI/AFP/Getty Images) ( Par7854803 )

A picture taken on June 28, 2014 shows members of Doctors Without Borders (MSF) putting on protective gear at the isolation ward of the Donka Hospital in Conakry, where people infected with the Ebola virus are being treated. The World Health Organization has warned that Ebola could spread beyond hard-hit Guinea, Liberia and Sierra Leone to neighbouring nations, but insisted that travel bans were not the answer. To date, there have been 635 cases of haemorrhagic fever in Guinea, Liberia and Sierra Leone, most confirmed as Ebola. A total of 399 people have died, 280 of them in Guinea. (CELLOU BINANI/AFP/Getty Images) ( Par7919795 )

A picture taken on June 28, 2014 shows protective boots hanging upside down in the isolation ward of the Donka Hospital in Conakry, where people infected with the Ebola virus are being treated. The World Health Organization has warned that Ebola could spread beyond hard-hit Guinea, Liberia and Sierra Leone to neighbouring nations, but insisted that travel bans were not the answer. To date, there have been 635 cases of haemorrhagic fever in Guinea, Liberia and Sierra Leone, most confirmed as Ebola. A total of 399 people have died, 280 of them in Guinea. (CELLOU BINANI/AFP/Getty Images) ( Par7919825 )

A member of Doctors Without Borders (MSF) wearing a white jersey (C) supervises the unloading of protection and healthcare material on July 22, 2014 at Conakry's airport, to fight the spread of the Ebola virus and treat people who have been already infected. The death toll in West Africa's Ebola outbreak has risen to 603, the World Health Organization (WHO) said last week, with 68 new fatalities mostly in Sierra Leone and Liberia. The UN health agency said the new deaths were recorded between July 8 and 12, and that 52 of them were in Sierra Leone, 13 in Liberia and three in Guinea, which had previously borne the brunt of the outbreak. Ebola first emerged in 1976 in what is now the Democratic Republic of Congo, and is named after a river in that country. (CELLOU BINANI/AFP/Getty Images) ( Par7937420 )

In this photo taken on Saturday, July 26, 2014, Liberia President Ellen Johnson Sirleaf, right, demonstrates to people how to wash their hands properly in order to prevent the spread of the Ebola virus, during Independence Day celebrations in the city of Monrovia, Liberia. Scientists from Fort Detrick say the number of Ebola cases in West Africa is much larger than official estimates indicate. Researchers from the U.S. Army Medical Research Institute of Infectious Diseases, who have worked in Sierra Leone and Liberia, say the current outbreak reaches beyond the 1,200 confirmed, suspected or probable cases and over 600 deaths that the World Health Organization has identified in West Africa as of July 23. (AP Photo/Abbas Dulleh) ( Liberia West Africa Ebola )

In this photo taken on Sunday, July 27, 2014, medical personnel work at the Doctors Without Borders facility in Kailahun, Sierra Leone where Dr. Sheik Humarr Khan died. A leading doctor who risked his own life to treat dozens of Ebola patients died Tuesday, July 29, 2014, from the disease, officials said, as a major regional airline announced it was suspending flights to the cities hardest hit by an outbreak that has killed more than 670 people. Dr. Sheik Humarr Khan, who was praised as a national hero for treating the disease in Sierra Leone, was confirmed dead by health ministry officials there. He had been hospitalized in quarantine. (AP Photo/ Youssouf Bah) ( Sierra Leone Ebola )

A man reads a newspaper on a Lagos street with the headline Ebola Virus kills Liberian in Lagos, Saturday, July 26, 2014. An Ebola outbreak that has left more than 660 people dead across West Africa has spread to the continent's most populous nation after a Liberian man with a high fever vomited aboard an airplane to Nigeria and then died there, officials said Friday. The 40-year-old man had recently lost his sister to Ebola in Liberia, health officials there said. It was not immediately clear how he managed to board a flight, but he was moved into an isolation ward upon arrival in Nigeria on Tuesday and died on Friday. (AP Photo/Sunday Alamba) ( Nigeria Ebola )

Dr. David Mcray, left, listens to a question during a news conference with Dr. Jason Brewington, center, and Dr. Darrin D'Agostino about fellow doctor Kent Brantly Monday, July 28, 2014, in Fort Worth, Texas. Brantly is one of two American aid workers that have tested positive for the Ebola virus while working to combat an outbreak of the deadly disease at a hospital in Liberia. (AP Photo/LM Otero) ( Ebola American Doctor )