The fuel injected Brexiter comments on the EU's vaccine problems miss many points.
1) no-one wanted to get out of the EU or the single market to protect ourselves better against a pandemic. See Brexit Tory controlled government policy 2016-2020 regarding the NHS and pandemic preparedness.
2) we could have, and, perhaps thanks to the need to genuflect to nationalists, or out of pragmatic needs, chosen to go our own way on procurement even within the EU.
3) none of this explains why it's good to be outside the single market, restricting our trade and making us poorer.
4) the implicit celebration of the vaccine nationalist cause, seemingly [but not actually] permitted by Brexit, ignores how this game plays out, namely: