Governments will pay a lot to get their economies going again. That burden will in turn fall on taxpayers one way or another; whether it's directly via taxes or budget cuts or indirectly via inflation or debt service.
My response is that we're getting the vaccine for free in return.
That said, I'm not sure that it's actually going to be free. That's just what I heard. I should point that out - I don't want to propagate bad info.
That's what you paid for, not for production, not for distribution, not for anything else.
You didn't pay taxes for a free vaccine, because you don't pay remotely enough taxes for that to be viable at all. Unless every country on earth takes their fair share of blind-faith financing a single company.