The consensus from studies is that, while not 100% effective at preventing tranmission, vaccines do reduce the transmission of Covid, even considering Delta (Omnicron is too recent for there to be data, but there's no reason to doubt transmission would also be reduced).
The consensus from studies is that, while not 100% effective at preventing tranmission, vaccines do reduce the transmission of Covid, even considering Delta (Omnicron is too recent for there to be data, but there's no reason to doubt transmission would also be reduced).