The first British citizen to contract the Ebola virus has arrived at a London hospital for treatment.
The unidentified male health care worker contracted the virus in Sierra Leone.
He was evacuated from the West African country Sunday and flown in a specially equipped military aircraft to a British airbase. From there he was transported in a special military ambulance to Britain's only Ebola isolation unit at the Royal Free Hospital in London.
Meanwhile, the World Health Organization (WHO) says one of its health care workers in Sierra Leone has also contracted the virus. WHO said Sunday it is working to ensure the worker receives the best care possible, including the option of medical evacuation to another care facility, if necessary.
The U.N. agency did not identify the nationality of the worker, but media reports described the worker as Senegalese.
The World Health Organization reports 1,427 people have died from the Ebola virus during the current outbreak. It also said that as of Friday there were 2,615 confirmed cases in Guinea, Liberia, Sierra Leone and Nigeria.