USA has effectively banned export. UK signed a better deal (https://www.politico.eu/article/the-key-differences-between-...), three months earlier, and as a result all AZ vaccine produced domestically in the UK is going to UK Citizens, and they are higher up the queue for AZ product manufactured in the EU. This produces the same effect as an export ban (i.e. domestic production used entirely by country), but is really just the result of competent procurement.
https://www.repubblica.it/cronaca/2021/01/26/news/interview_...
EU shat the bed by penny pinching. Don't paint incompetence as "humanitarian efforts"