Before Trump, vaccines took an average of 7 to 8 yrs to develop and be brought to the public.
It is amazing what happens when the people who develop vaccines have people all around them dying from a disease, including people in their own family circle. Trump had very little to do with it.
The power to produce from a massive infusion of private sweat equity comes from an internal feeling of national urgency. No one person, president or otherwise, flicks a switch and then it magically starts to happen.
Oh, wait a minute...There was this one lady...