US aid worker Nancy Writebol has been discharged from Emory University Hospital after recovering from Ebola, health chiefs have said.
The 59-year-old had contracted the disease while working as a missionary in the West African country of Liberia during the recent outbreak of the deadly virus.
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.