Washington: President Barack Obama said he was considering appointing an Ebola "czar" to coordinate the fight against the virus in the United States, but he remained opposed to a ban on travel from West Africa.
Obama`s administration is facing sharp criticism from lawmakers over its efforts to contain the disease at home. Obama authorised calling up military reservists for the US fight against Ebola in West Africa on Thursday.
US concerns have intensified after two Texas nurses, who cared for a dying Liberian patient, contracted the virus that has killed nearly 4,500 people. Spain is also grappling with the spread of the disease, with four new patients with suspected Ebola symptoms admitted to hospitals.
The disease continues to spread in West Africa where the outbreak began in March, and reached the last remaining district in Sierra Leone that had not been affected by Ebola.
US lawmakers held a congressional hearing about the administration`s handling of the Ebola outbreak in the United States. Some have called for a czar and a ban on travel from West Africa.
"It may be appropriate for me to appoint an additional person" to oversee efforts to contain Ebola, Obama told reporters after meeting aides involved in the fight against the disease.
Obama said experts have told him "a flat-out travel ban is not the way to go" because current screening measures at airports are working.
He said he had no philosophical objection to a travel ban but that some travellers might attempt to enter the United States by avoiding screening measures, which could lead to more Ebola cases, not fewer.
Jamaica announced an immediate travel ban on Thursday. South America`s Guyana said it has denied entry to citizens from four Ebola-hit West African nations during the past five weeks.
US Federal Aviation Administration chief Michael Huerta told reporters separately that the government was assessing whether to issue a travel ban "on a day-to-day basis."
Schools close in Texas, Ohio
Amber Vinson, one of the nurses who treated the Ebola patient at Texas Health Presbyterian Hospital in Dallas and contracted the virus, travelled to Ohio over the weekend on a Frontier Airlines flight while running a slight fever.
Dr Christopher Braden, a spokesman for the Centers for Disease Control and Prevention (CDC), said Vinson may have been ill as early as Friday, when she boarded the flight from Dallas to Cleveland. Vinson returned to Texas on Monday.
Braden told a news conference in Akron, Ohio, that the CDC may include people who were aboard the flight in its investigation of possible contacts.
Dr Thomas Frieden, the CDC director, has said it is unlikely passengers who flew with Vinson were infected because the nurse had not vomited or bled on the flight, but he said she should not have boarded the plane.
Concerns about Ebola exposure prompted several schools in Ohio and Texas to close because people with ties to the schools may have shared the flight with Vinson.
An air ambulance transported Vinson to Atlanta`s Emory University Hospital on Wednesday for treatment. The first nurse to contract Ebola, Nina Pham, 26, was flown to the National Institutes of Health (NIH) in Bethesda, Maryland, to be treated in an isolation unit.
A YouTube video made by Pham`s physician, Dr Gary Weinstein, before her discharge showed her in a bed at Texas Health Presbyterian Hospital and with Weinstein in protective gear.
In the video, Pham wiped away tears and said, "Come to Maryland, everybody!" and "I love you guys." She requested that the video be shared by the hospital.
But more than a week after Duncan died, the hospital acknowledged it had made mistakes in diagnosing Duncan and in giving the public accurate information.
Dr Daniel Varga, chief clinical officer and senior vice president of Texas Health Resources, which owns Texas Health Presbyterian Hospital, said the hospital was "deeply sorry".
He said there had been no Ebola training for staff before Duncan was admitted.
The hospital defended its treatment of Duncan, saying in a statement that it had followed CDC guidelines. Criticisms that had surfaced in the media about its Ebola treatment "are often out-of-context and sensationalised. Others are completely inaccurate," it said.
Halt urged for West Africa flights
In the congressional hearing, lawmakers focused on Frieden, with several Republicans saying flights from West Africa should be stopped.
"We need to look at all the options available to keep our families safe and move quickly and responsibly to make any necessary changes at airports," Democratic Representative Bruce Braley of Iowa told the hearing.
The virus is spread through direct contact with bodily fluids from an infected person showing symptoms of Ebola. Ebola is not airborne.
Frieden argued, as he has before, that closing US borders would not work and would leave the country less able to track people with Ebola entering. Moreover, cutting flights to Africa would hit the US ability to stop the virus at its source, he said.