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.
The data from the study, which has not yet been peer reviewed, supports the four to 12-week prime-boost dosing interval that many global regulators have recommended.
Analyses of positive coronavirus swabs in the UK population suggest the vaccine may have a substantial effect on transmission of the virus, with a 67% reduction in positive swabs among those vaccinated with the Oxford/AstraZeneca jab.