Trump's Operation Warp Speed worked.
He cut through bureaucratic red tape at the Food and Drug Administration, and recruited the private sector to develop a variety of alternatives.
Crucially, and controversially, the government purchased hundreds of millions of doses of vaccines that had yet to be proven, so that if and when they were shown to work, they could be distributed rapidly.
Despite a few early hiccups in distribution, the plan was a huge success.
But since everything orange man did was bad.
Biden's crew did away with it and reverted back to having the government run things.
Thus today we have a mess.