How Many Million Americans Would You Guess Have Gained Wuhan Immunity by Antibody After Infection Maybe 200?

Translate:

Of the 150 million Americans who have been “fully vaccinated,” how many of them had already been carrying the wuhan antibody (after asymptomatic or slightly symptomatic infection) and so didn’t need the mRNA shot, maybe half of them added to perhaps a hundred million more (who’ve not taken the shot) thus approaching 200 million with the antibody hence herd immunity upon us?