President Donald Trump's administration is considering fast-tracking an experimental coronavirus vaccine from the UK for use in America ahead of the presidential election, it has been reported.
Human trials of the coronavirus vaccine candidate being developed at the University of Oxford suggest it is safe and induces an immune response to Covid-19.
Early results indicate the jab could provide double protection - generating an immune response which stimulates the body to produce both an antibody and T-cell response.
But what is the US president considering, what does the vaccine do and how does it work? What is President Trump considering?