A vaccine against coronavirus being developed in Britain is showing positive signs it could work after trials revealed that participants are developing cells that can kill off the disease, it was revealed today.

The team of scientists in Oxford have already said they are ‘80 per cent’ confident they can have a jab available by September with more good news now expected this week in The Lancet.

Today it has emerged that trials have revealed that the vaccine is kickstarting an antibody reaction in the body and the crucial T-cells that will kill off the virus in the body.

Some 8,000 Britons are taking part in a major trial of the Oxford vaccine, which is being manufactured by pharmaceutical firm AstraZeneca.

But, as rates of coronavirus have fallen in this country, researchers are also aiming to vaccinate 4,000 individuals in Brazil and 2,000 in South Africa.