you have NO proof of that.
.. and there are indications there are already re-infections.
These are RNA viruses which mutate rapidly.
In fact, some think the SARS-CoV-2 had two forms,
with the less virulent form released in California
to protect the Democrats there in Nov. 2019.
He does have proof of that. It’s called years of understanding of immunology. There is scant evidence of reinfection. Mostly from China. You want to believe that have at it
Go back under the bed. Does your keyboard fit?