A single dose of a coronavirus vaccine can reduce household transmission
of the virus by up to half, a study shows.

Those given a first dose of either the Pfizer or AstraZeneca vaccines -
and who became infected three weeks later - were between 38% and 49%
less likely to pass the virus on than unvaccinated people, PHE found.

In the study, protection against Covid was seen from about 14 days after
vaccination, with similar levels of protection regardless of age of
cases or contacts, PHE said in a statement.

https://www.bbc.co.uk/news/health-56904993

Another good reason to get the vaccine.
This sends a message to all of the antvaxxers.