The EU's drugs regulator has approved the use of the Oxford-AstraZeneca Covid vaccine for all adults.

The European Medicines Agency (EMA) said the AstraZeneca vaccine was about 60% effective in the trials on which it based its decision.

The move comes amid a dispute over whether AstraZeneca is breaking its vaccine delivery commitments to the EU.

The European Commission has published its contract with the Anglo-Swedish drug-maker, hoping to show a breach.

The bloc agreed to buy up to 400 million doses of the AstraZeneca vaccine last year.

In a press conference later on Friday, Astra-Zeneca chief executive Pascal Soriot conceded that it had "teething issues" in the yield of vaccine at some production sites.

"We're talking about biology manufacturing here," he said, adding - "it's not like doing an orange juice."

Mr Soriot said AstraZeneca had millions of doses ready to ship to the EU, and was working 24/7 to increase capacity.

The European Commission has now given final approval for the vaccine.