Volunteers have begun being immunised with a new UK coronavirus vaccine.
About 300 people will have the vaccine over the coming weeks, as part of a trial led by Prof Robin Shattock and his colleagues, at Imperial College London.
Tests in animals suggest the vaccine is safe and triggers an effective immune response.
Experts at Oxford University have already started human trials.
The trials are among many across the world – there are around 120 vaccine programmes under way.