What that study shows is that unvaccinated people in the study cohort were twice as likely to experience a reinfection. A lot of things could explain that and i

What that study shows is that unvaccinated people in the study cohort were twice as likely to experience a reinfection. A lot of things could explain that and it's a far cry from establishing that it boosts immunity. The study period was also during the point when effectiveness of the initial mRNA vaccine doses was probably peaking.