Joe Biden himself said in a public speech that you will not get COVID if you get the vaccine. So no, that is not alt-right spin as you put it.
https://www.washingtonexaminer.com/news/one-year-biden-said-...
https://www.washingtonexaminer.com/news/one-year-biden-said-...
https://www.cnbc.com/2020/08/07/coronavirus-vaccine-dr-fauci...
> White House coronavirus advisor Dr. Anthony Fauci that the chances of scientists creating a highly effective vaccine — one that provides 98% or more guaranteed protection — for the virus are slim.
> Scientists are hoping for a coronavirus vaccine that is at least 75% effective, but 50% or 60% effective would be acceptable, too, he said.
> The FDA has said it would authorize a coronavirus vaccine so long as it is safe and at least 50% effective.