The news is good!
www.theguardian.com/uk-news/2021/apr/28/single-dose-of-covid-vaccine-can-nearly-halve-transmission-of-virus-study-finds
So after a single dose of either Pfizer or AZ, people who test +ve for the virus are 38% to 49% less likely to pass it on to others.
This is on top of the 65% reduction in people testing +ve following a single jab.
Put the two together and it means that after one jab you're 60-68% LESS likely to infect others.
Obviously after 2 jabs, it will be higher still.