The high success rate from one part of the study has come under scrutiny this week. Here's what we know.
Pharma giant AstraZeneca says it's "too early to comment on pricing post-pandemic".
The pharma giant said it was "too early to comment on pricing post-pandemic" for the coronavirus drug it is trialing at Oxford University.
The Duke of Cambridge met researchers working for the Oxford Vaccine Group on Wednesday.
Roger Bannister made headlines around the world at 25 when he ran a mile in 3 minutes and 59.4 seconds.