Breakthrough infections might not be a big transmission risk. Here's the evidence Are vaccinated people who get COVID as likely to spread the infection as unvaccinated people? Scientists don't think so. NPR.org

Conventional wisdom says that if you're vaccinated and you get a breakthrough infection with the coronavirus, you can transmit that infection to someone else and make that person sick.

But new evidence suggests that even though that may happen on occasion, breakthrough infections might not represent the threat to others that scientists originally thought. ...