What's to question?
The last president made a complete and utter pig's breakfast of dealing with the crisis. His response was a non response, they actually had no vaccine distribution plan, did you realize that? He want wanted to wash his hands of the whole thing, and leave it up to the individual states.... Trump played golf while America burned.
This president, despite having ZERO co-operation from T****'s cronies during the transition, nonetheless got a plan in order in quick time - after promising to deliver 100 million vaccinations in the first 100 days of his presidency, they are on target for twice that.
Yes, Biden might be getting old, and a bit frail, and he might have minor issues with fumbling his words sometimes, but I'd rather have him as POTUS than the vile, corrupt, narcissistic, bullying bull-**** artist who was squatting in the White House for the previous four years.