Pharmaceutical company AstraZeneca and Oxford University have acknowledged an error in their phase three vaccine trial.

While most of the volunteers got the correct dose for both of their two shots, not all did.

Regulators agreed that the trial could continue after being informed, and the error had no effect on vaccine safety.

UPDATE: An AstraZeneca spokesperson said:

"We are further evaluating the data and will work with regulators on the best approach for further evaluation. This would add to data from existing trials which are currently being prepared for regulatory submission."

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