@MauraandLaura
You’ve linked an article from Feb2021.
The latest research (my article is from Oct 2021) is that it does:
People who are fully vaccinated against covid-19 are far less likely to infect others, despite the arrival of the delta variant, several studies show. The findings refute the idea, which has become common in some circles, that vaccines no longer do much to prevent the spread of the coronavirus.
“They absolutely do reduce transmission,” says Christopher Byron Brooke at the University of Illinois at Urbana-Champaign. “Vaccinated people do transmit the virus in some cases, but the data are super crystal-clear that the risk of transmission for a vaccinated individual is much, much lower than for an unvaccinated individual.”
A recent study found that vaccinated people infected with the delta variant are 63 per cent less likely to infect people who are unvaccinated.