Does it get any clearer than this. Straight from the go to site...

Does it get any clearer than this.
Straight from the go to site for the vaccinated.  The CDC


Statement from CDC Director Rochelle P. Walensky, MD, MPH on Today’s MMWR


Today, some of those data were published in CDC’s Morbidity and Mortality Weekly Report (MMWR), demonstrating that Delta infection resulted in similarly high SARS-CoV-2 viral loads in vaccinated and unvaccinated people. High viral loads suggest an increased risk of transmission and raised concern that, unlike with other variants, vaccinated people infected with Delta can transmit the virus. This finding is concerning and was a pivotal discovery leading to CDC’s updated mask recommendation.
The masking recommendation was updated to ensure the vaccinated public would not unknowingly transmit virus to others, including their unvaccinated or immunocompromised loved ones.


The masking recommendation was updated to ensure the vaccinated public would not unknowingly transmit virus to others, including their unvaccinated or immunocompromised loved ones.