THE Oxford AstraZeneca vaccine may reduce transmission of coronavirus by two thirds with just a single jag, according to a new study.

In a rare piece of good news, the first dose offers protection of 76% up to three months and may reduce transmission by 67% – with efficacy rising to 82.4% after the second dose 12 weeks later.

The findings indicate that those who have been vaccinated are not only protected from the disease, but that they are not likely to pass on the virus to anyone.

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The data from the study by the University of Oxford, which has not yet been peer reviewed, is a major boost for Scotland and the UK, who all decided to delay the second dose to 12-weeks in a bid to get as many people inoculated.

Health Secretary Matt Hancock said: “This is a hugely encouraging study and further reinforces our confidence that vaccines are capable of reducing transmission and protecting people from this awful disease.

“This report shows the Oxford vaccine works and works well.”

Professor Andrew Pollard, chief investigator of the Oxford Vaccine Trial – and study co-author, said: “These new data provide an important verification of the interim data that was used by more than 25 regulators including the MHRA (Medicines and Healthcare products Regulatory Agency) and EMA (European Medicines Agency) to grant the vaccine emergency use authorisation.

“It also supports the policy recommendation made by the Joint Committee on Vaccination and Immunisation (JCVI) for a 12-week prime-boost interval, as they look for the optimal approach to roll out, and reassures us that people are protected from 22 days after a single dose of the vaccine.”