Study shows AstraZeneca jab protects 12 weeks after single dose and may cut transmission

The data from the study, which has not yet been peer reviewed, supports the four to 12-week prime-boost dosing interval that many global regulators have recommended.

The data is from a study which has not yet been peer reviewed. Picture Owen Humphreys/PA

The University of Oxford’s coronavirus vaccine offers protection of 76% up to 12 weeks after a single dose and may reduce transmission by 67%, according to a new study.

After the second dose, vaccine efficacy from two standard doses is 82.4% with the three-month interval being used in the UK, researchers from the University of Oxford say.