at this point it's basically well known scientifically, but another large study (Cleveland Clinic) confirms that the vaccines are unnecessary after previous infection. Gotta wonder when more places start paying attention and changing vaccination policies.
https://www.medrxiv.org/content/10.1101/2021.06.01.21258176v2
Necessity of COVID-19 vaccination in previously infected individuals
"Among the 52238 included employees, 1359 (53%) of 2579 previously infected subjects remained unvaccinated, compared with 22777 (41%) of 49659 not previously infected. The cumulative incidence of SARS-CoV-2 infection remained almost zero among previously infected unvaccinated subjects, previously infected subjects who were vaccinated, and previously uninfected subjects who were vaccinated, compared with a steady increase in cumulative incidence among previously uninfected subjects who remained unvaccinated. Not one of the 1359 previously infected subjects who remained unvaccinated had a SARS-CoV-2 infection over the duration of the study"
"Conclusions Individuals who have had SARS-CoV-2 infection are unlikely to benefit from COVID-19 vaccination"