The United Kingdom begins its first human trial of coronavirus vaccine has begun in Oxford and a first patient has been injected.
Two volunteers were injected, the first of more than 800 people recruited for the study.
Half of the volunteers will receive the Covid-19 vaccine, and the other half, a control vaccine which protects against meningitis but not coronavirus.
The design of the trial means volunteers will not know which vaccine they are getting, though doctors will.
The vaccine was developed under three months by a team at Oxford University.
The professor of vaccinology at the Jenner Institute, Sarah Gilbert, led the pre-clinical research.
“Personally I have a high degree of confidence in this vaccine,” she said.
“Of course, we have to test it and get data from humans. We have to demonstrate it actually works and stops people getting infected with coronavirus before using the vaccine in the wider population”, she added.
Prof Gilbert previously said she was “80% confident” the vaccine would work, but now prefers not to put a figure on it, saying simply she is “very optimistic” about its chances.
The Coronavirus vaccine is made from a weakened version of a common cold virus Known as “Adenovirus”, from animals specifically Chimpanzees that were modified so it cannot grow in humans according to reports.