? This is quite wide-spread and old news, and trivial to look up yourself before getting snarky.
> For people infected with the Delta variant, similar amounts of viral genetic material have been found among both unvaccinated and fully vaccinated people.
Being vaccinated reduces the chance of getting infected in the first place. This is true even for the delta variant (although much more so for earlier variants)
Your link contained a speculation about the length of time for which vaccinated people are infectious. Mine is a study demonstrating that the chance of transmission to contacts is reduced.
Surely probability of transmission is the key factor determining whether vaccination reduces the spread of the disease?
https://els-jbs-prod-cdn.jbs.elsevierhealth.com/pb-assets/La...