Re: Ok, I'll bite
Try this study of more than 144,000 healthcare workers in Scotland.
https://www.bbc.com/news/uk-scotland-56373252
It shows that people living with a vaccinated health worker were at least 30% less likely to contract the virus than those living with an unvaccinated health worker. Strong evidence to suggest that the vaccine both prevents illness in the vaccinated person and also reduces virus shedding to protect others.