The issue is going to be to convince many people who do not believe Covid is real to take a vaccine for something that they do not think even exists. This story on CNN hints at the challenges of convincing people.
https://www.msn.com/en-us/health/medical/nurse-some-patients-who-test-positive-refuse-to-believe-they-have-covid-19/vi-BB1b
This quote by the trump isn't going to help the cause. Many of his believers think Covid is made up.
On October 27th, Trump tweeted: "ALL THE FAKE NEWS MEDIA WANTS TO TALK ABOUT IS COVID, COVID, COVID. ON NOVEMBER 4th, YOU WON'T BE HEARING SO MUCH ABOUT IT ANYMORE. WE ARE ROUNDING THE TURN!!!"