If it nationalized the factories, or seized supply it hadn't ordered, I might consider it the bad guy. But irrespective of who gets the vaccines first, the EU has already bought the some portion of the supply.
I understand that viewpoint but feel like the long term consequences politically would be too high. We live in a globalised world where most of the richest countries do little of their own manufacturing. If we start blocking exports in times of crisis the foundations of that system would be damaged.
Nationalization etc. happens on the national level only.
I would argye that the EU merits government status, given the degree to which it dictates standards in the eurozone. Even though it is fairly weak, and lacks enforcement capacity on its own, my understanding is that the EU as a body has the capacity to set standards for the block as a whole, restricting export of certain goods like the vaccine for example. I could be wrong, though?