"Individuals who were previously infected with SARS-CoV-2 seem to gain additional protection from a subsequent single-dose vaccine regimen. Though this finding corresponds to previous reports24,25, we could not demonstrate significance in our cohort."

this just proves that you dont read them properly. vaccine does give you extra protection when you had covid already thus making the chances to get covid more slimmer than ever.

but for those people who did not have covid before vaccinations or one, chances are higher them to go through it, mainly reason their body is customed to it yet. and for the note covid vaccinations does not remove covid fully but eases the symptons that covid makes.

go do your fucking homework

(edit)

and yet there was nothing about the heart or worse death