Very few countries are in a position to provide the full supply chain for production of the vaccines. And that should not be a problem. This "vaccine nationalism" is more posturing than anything else, will be short-lived. And I'm somewhat curious if there are people going along with it because they see in it as a good PR means of making vaccines "more desirable" to be public. It's interesting that despite the talk of the UK having declined terminally it does still have a lot of tech industry going there. Including one of the main industries (by value, and technical difficulty) of our age, pharmaceuticals. The UK shut down much of its heavy industry voluntarily, which was a mistake, but it's not finished!