Q&A: Why the controversy around EU 'vaccine nationalism'?

The European Commission has introduced new criteria on whether it will allow Covid-19 vaccines and ingredients to be exported to countries that are ahead of the EU in the vaccination rollout

The EU has watched AstraZeneca supplies make their way to the UK while EU supply forecasts have been slashed.

The EU's tightening of Covid-19 vaccine exports to countries, such as the UK, which have better vaccination rates has sparked a wave of controversy across the continent.

What HAS THE EU DECIDED TO DO?