A British national who tested positive for Ebola in Sierra Leone is a healthcare worker, living in the west African country, the deputy chief medical officer of the Department of Health has said.
Professor John Watson, deputy chief medical officer, said: "It is important to be reassured that although a case of Ebola in a British national healthcare worker residing in Sierra Leone has been identified and is being brought back to the UK the overall risk to the public in the UK remains very low".
More than 160 staff will work in a UK-funded facility in Sierra Leone which is due to open in October.
UK trials of a vaccine for the Ebola virus began today - but some experts complain that the response has been a long time coming.
A Swansea doctor who took leave to treat Ebola patients in Africa, is back on the wards after three weeks in isolation.