“Individuals who have had two vaccine doses can be just as infectious as those who have not been jabbed.”
https://www.bbc.com/news/health-59077036
(Article contains link to the Lancet study)
https://www.bbc.com/news/health-59077036
(Article contains link to the Lancet study)
From the Lancet study linked in the article:
> The SAR in household contacts exposed to the delta variant was 25% (95% CI 18–33) for fully vaccinated individuals compared with 38% (24–53) in unvaccinated individuals.