Students of Government Secondary School Garki wash their hands, as school resumes in Abuja September 22, 2014. Nigeria and Senegal, two of the five countries affected by the world's worst ever Ebola outbreak are managing to halt the spread of the disease, the World Health Organization said on Monday, although the overall death toll rose to 2,793 out of 5,762 cases. Photo: Reuters/Stringer
A school official takes a Government Secondary School Garki pupil's temperature using an infrared digital laser thermometer, as school resumes in Abuja September 22, 2014. Photo: Reuters/Stringer
A school official takes the temperature of a parent, who brought her child to school, using an infrared digital laser thermometer in front of the school premises, at the resumption of private schools, in Lagos September 22, 2014. Photo: Reuters/Akintunde Akinleye
Health workers load Spanish Ebola patient, Catholic priest Manuel Garcia Viejo, into an ambulance on the tarmac of Torrejon airbase after he was repatriated from Sierra Leone for treatment in Spain September 22, 2014. Garcia Viejo is the second Spanish priest to be diagnosed with Ebola after Miguel Pajares, also a member of San Juan de Dios, who died last month days after being brought back to Spain from Liberia. Photo: Reuters/Ministry of Defence/Handout via Reuters
A Spanish health worker looks at Ebola patient, Catholic priest Manuel Garcia Viejo, before loading him into a Spanish Air Force transport plane at Lungi airport in Freetown, for his repatriation to Spain for treatment September 21, 2014. Photo: Reuters/Ministry of Defence/Handout via Reuters
. A volunteer health worker practises using a personal protective equipment (PPE) suit at a newly-constructed Ebola virus treatment center in Monrovia, Liberia, September 21, 2014. Photo: Reuters/James Giahyue
A man stands at the gate of an Ebola virus treatment center in Monrovia September 21, 2014. Photo: Reuters/James Giahyue
A loadmaster stands by with another pallet of relief supplies to load onto a 747 aircraft at New York's John F. Kennedy International Airport September 20, 2014. The chartered 747 jet, carrying the largest single shipment of aid to the Ebola zone to date and coordinated by CGI and other U.S. aid organizations, departed the airport on Saturday afternoon bound for West Africa. Photo: Reuters/Carlo Allegri
Supplies, including 100 tons of emergency medical aid, are seen before being loaded on to a 747 aircraft at New York's John F. Kennedy International Airport September 20, 2014. Photo: Reuters/Carlo Allegri
Pallets of supplies wait to be loaded on a 747 aircraft at New York's John F. Kennedy International Airport September 20, 2014. Photo: Reuters/Carlo Allegri
A man has his temperature checked for symptoms of the Ebola virus before entering a sports betting parlor in Monrovia September 19, 2014. Photo: Reuters/James Giahyue
A pregnant woman suspected of contracting Ebola is lifted by stretcher into an ambulance in Freetown, Sierra Leone September 19, 2014 in a handout photo provided by UNICEF.
A woman takes the temperature of a social mobilizer before he handles health supplies in Freetown, Sierra Leone September 19, 2014 in a handout photo provided by UNICEF.
Volunteer Ruth Atkins receives an injection of the Ebola vaccine, at the Oxford Vaccine Group Centre for Clinical Vaccinology and Tropical Medicine (CCVTM) in Oxford, southern England September 17, 2014. The first volunteer in a fast-tracked British safety trial of an experimental Ebola vaccine made by GlaxoSmithKline received the injection on Wednesday, trial organizers said. Photo: Reuters/Steve Parsons/Pool
Kent Brantly, a medical missionary with Samaritan's Purse and an Ebola survivor, speaks with Nancy Lindborg, assistant administrator of the Bureau for Democracy, Conflict and Humanitarian Assistance, at the U.S. Agency for International Development, as he prepares to testify before a House Foreign Affairs Subcommittee hearing on "global efforts to fight Ebola" on Capitol Hill in Washington September 17, 2014. Photo: Reuters/Joshua Roberts
Health workers bring a woman suspected of having contracted Ebola virus to an ambulance in front of a crowd in Monrovia, Liberia, September 15, 2014. Airlines have halted many flights into and around West Africa, where governments have closed some borders and imposed travel restrictions in a bid to fight an Ebola outbreak that has killed over 2,400 people. Photo: Reuters
Professor Adrian Hill, Director of the Jenner Institute, and Chief Investigator of the trials, holds a phial containing the Ebola vaccine at the Oxford Vaccine Group Center for Clinical Vaccinology and Tropical Medicine (CCVTM) in Oxford, southern England September 17, 2014. The first volunteer in a fast-tracked British safety trial of an experimental Ebola vaccine made by GlaxoSmithKline received the injection on Wednesday, trial organizers said. Photo: Reuters
Members of the Security Council attend a meeting on the Ebola crisis at U.N. headquarters in New York, September 18, 2014. The United Nations will create a special mission to combat Ebola, deploying staff in the worst-affected states - Liberia, Guinea and Sierra Leone - to push a "rapid and massive mobilization" of people, material and financial resources. Photo: Reuters
Dr. Joel Montgomery, team leader for the CDC team in Liberia, adjusts a colleague's personal protective equipment before entering the Ebola treatment unit in Monrovia, Liberia. Photo released September 16, 2014. Photo: Reuters/Athalia Christie/CDC
People walk past a billboard displaying a government message about Ebola, which reads: "The risk of Ebola is still there. Let us apply the protective measures together", on a street in the capital Abidjan, Ivory Coast, September 10, 2014. Photo: Reuters/Luc Gnago
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.
Photo: Reuters/James Giahyue
Health workers push an Ebola patient who escaped from quarantine from Monrovia's Elwa hospital, into an ambulance in the center of Paynesville, Liberia, September 1, 2014.
Photo: Reuters/Reuters TV
Health workers wearing protective clothing prepare to carry an abandoned dead body presenting with Ebola symptoms at Duwala market in Monrovia, August 17, 2014.
Medicins Sans Frontieres health workers prepare at an isolation camp in Monrovia, Liberia, August 23, 2014. Photo: Reuters/2Tango
Protection clothes and boots from Medicins Sans Frontieres health workers dry outside an isolation unit in Monrovia, Liberia, August 23, 2014. Photo: Reuters/2Tango
Liberian security forces stand in front of protesters after clashes at West Point neighborhood in Monrovia, August 20, 2014. Photo: Reuters/2Tango
Volunteers lower a corpse, prepared with safe burial practices to ensure it does not pose a health risk to others, into a grave in Kailahun, Sierra Leone, July 18, 2014. Photo: Reuters
Medical staff working with Medecins sans Frontieres prepare to bring food to patients kept in an isolation area at the MSF Ebola treatment center in Kailahun, Sierra Leone, July 20, 2014.
Photo: Reuters/Tommy Trenchard
A bio-hazard waste container is seen in an undated handout photo provided by the Centers for Disease Control and Prevention (CDC) in Atlanta. U.S. hospitals may be unprepared to safely dispose of the infectious waste generated by any Ebola virus disease patient to arrive unannounced in the country, potentially putting the wider community at risk, biosafety experts said.
An isolation room at Emory University Hospital in Atlanta is shown in this undated file handout photo courtesy of Emory Hospital.
A soiled bandage is disposed of into a bio-hazard waste container in a 2004 archive photo provided by the Centers for Disease Control and Prevention (CDC) in Atlanta.