The study found that vaccinated prisoners were just as infectious as unvaccinated prisoners and there was no difference in the length of sickness between the vaccinated and unvaccinated...
"During a high-transmission outbreak of the SARS-CoV-2 Delta variant in a prison setting, we failed to find different durations of RT-PCR positivity, Ct values, or durations of viral culture positivity in fully vaccinated persons compared with persons who were not fully vaccinated."
The study found that vaccinated prisoners were just as infectious as unvaccinated prisoners and there was no difference in the length of sickness between the vaccinated and unvaccinated...
"During a high-transmission outbreak of the SARS-CoV-2 Delta variant in a prison setting, we failed to find different durations of RT-PCR positivity, Ct values, or durations of viral culture positivity in fully vaccinated persons compared with persons who were not fully vaccinated."
https://www.medrxiv.org/content/10.1101/2021.11.12.21265796v1