The first person infected with Ebola in the US is being transferred from a Texas hospital to the National Institutes of Health near the US capital.
Nurse Nina Pham is due to arrive later tonight at the facility located in Bethesda, Maryland.
"We will be supplying her with state-of-the-art care in our high-level containment facilities," Anthony Fauci, head of the National Institute for Allergy and Infectious Diseases, told a Congressional hearing.
The NIH Clinical Center's facility is "staffed by infectious diseases and critical care specialists ... trained in strict infection control practices optimised to prevent spread of potentially transmissible agents such as Ebola," the NIH said in a statement.
Ms Pham was closely involved in the care of a Liberian man, Thomas Eric Duncan, who was the first Ebola case diagnosed in the United States.
Mr Duncan died of Ebola on 8 October at Texas Health Presbyterian Hospital in Dallas.
Ms Pham was diagnosed with Ebola on 12 October and has been in isolation at Texas Health, which said the decision to move her was made with officials at the Centers for Disease Control and Prevention.
Her condition has remained "good," the hospital said.
"I appreciate everything that my co-workers have done to care for me at Texas Health Presbyterian Hospital Dallas," Ms Pham said in a statement issued by the hospital.
"I'm doing really well thanks to this team, which is the best in the world."
Ms Pham's colleague Amber Vinson was diagnosed with Ebola yesterday.
She was immediately transported to another high-level biocontainment unit at Emory University Hospital in Atlanta.
Both worked as nurses in the intensive care unit. Mr Duncan was admitted on 28 September, but was not diagnosed with Ebola until 30 September.
Around 70 health care workers from the hospital are under close watch for signs of infection. The virus's incubation period is between two and 21 days.
Ebola is transmitted through close contact with the bodily fluids of an infected and symptomatic person.
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Since health care workers are at particular risk of infection, US authorities have warned that more cases are possible.
The hemorrhagic virus is spreading quickly in West Africa, and has killed more than 4,400 people in the world's largest outbreak to date.
Meanwhile, US politicians have strongly criticised the Obama administration's handling of Ebola on US soil and warned that public trust is waning.
"The trust and credibility of the administration and government are waning as the American public loses confidence each day, with demonstrated failures of the current strategy," said the chairman of a House of Representatives panel, Republican Timothy Murphy of Pennsylvania.
As pressure mounts for a US travel ban on countries in west Africa hardest hit by the Ebola epidemic, Republicans and Democrats spent hours at the subcommittee hearing grilling the United States' top public health adviser.
CDC Director Dr Thomas Frieden insisted that Ebola poses no major US health risk.
He also warned that a ban on travellers from Ebola-stricken countries in west Africa would make the disease harder to track and would pose a long-term danger to the US health system.
"I will tell you, as the director of CDC, one of the things I fear about Ebola is that it could spread more widely in Africa. If this were to happen, it could become a threat to our health system and the healthcare we give for a long time to come," said Mr Frieden.
Doubts about US effectiveness in protecting Americans intensified after Ms Vinson travelled aboard a commercial airliner while running a slight fever.
Fears of infection from Ms Vinson's Monday flight from Cleveland to Dallas a day before she was diagnosed with Ebola led to school closings in Ohio and Texas.
It also caused airline stock prices to fall on Wall Street.
This evening, Mr Obama has authorised military reservists to support humanitarian efforts to combat Ebola in west Africa.
Our latest overview of the West Africa #EbolaOutbreak is out: http://t.co/yBGVQfaYe3 pic.twitter.com/7xNPr4s1A0
— OCHA ROWCA (@OCHAROWCA) October 16, 2014EU to review Ebola screening procedures
Elsewhere, the European Union health ministers have agreed to begin an immediate review of the screening of passengers departing Ebola-hit countries in west Africa.
The health ministers meeting in Brussels had also agreed to "coordinate" measures at entry points to the 28-nation union, although any decision on screening for Ebola rests with individual countries.
The European Commission "will immediately undertake an audit of exit screening systems in place in the affected countries ... to check their effectiveness and reinforce them as necessary," health commissioner Tonio Borg said.
The review of the exit screening in Liberia, Guinea and Sierra Leone will be conducted in coordination with the World Health Organisation, he said.
They would "coordinate national measures" at EU arrival points such as having common protocols and procedures on passenger questionnaires.
Officials said some 21 health ministers attended the meeting which was called at short notice.
With the decision up to member states to decide what measures to take, the meeting was focused on coordinating efforts to stop the spread of the worst-ever outbreak of the virus.
Spain hospitalises Liberia missionary for possible Ebola
A Spanish missionary who recently returned from Liberia has been hospitalised at a Madrid unit specialising in Ebola cases after showing signs of fever, officials said.
The missionary is a member of the Hospital Order of San Juan de Dios, a Catholic group that runs a charity working with Ebola victims in west Africa, the government said in a statement.
Two elderly Spanish missionaries from the same order were diagnosed with Ebola in west Africa in August and September and flown home to Spain for treatment, but they both died shortly afterwards.
A 44-year-old Spanish nurse at Madrid's Carlos III Hospital where they were cared for was on 6 October herself diagnosed with Ebola, the first person known to have become infected with the virus outside Africa.
The government statement said the unnamed missionary arrived in Spain from Liberia on Saturday and he will be admitted to the Carlos III Hospital, which Spain has designated to handle Ebola cases.
Spanish priest Miguel Pajares, 75, who was infected with Ebola in Liberia, was flown to Madrid on a specially equipped Airbus military plane on 7 August. He died on 12 August.
Fr Pajares was the first Ebola patient of the current outbreak to be brought to Europe for treatment.
The second missionary, Manuel Garcia Viejo, 69, was repatriated from Sierra Leone and died on 25 September.
The nurse who became infected after treating the two missionaries, Teresa Romero, remains in stable condition at Carlos III hospital.
Health authorities hospitalised three other people on Thursday for testing for Ebola.
A passenger who arrived in Madrid from Nigeria via Paris on an Air France Flight who had started shaking during the flight has also been taken to the hospital.
