CDC Director: Vaccines can't stop transmission

August 6, 2021: CDC Director Walensky tells Wolf Blitzer that what the emergency use genetic shots "can't do anymore is prevent transmission" and warns that fully vaccinated people should "wear a mask in public indoor settings," particularly if they are "going home to somebody who has not been vaccinated to somebody who can't get vaccinated, somebody who is immunosuppressed or a little frail, somebody with comorbidities."