Vaccinated People With Breakthrough Infections Can Spread The Delta Variant, CDC Says, 07.30.21
July 30, 2021 | 3:34 PM ET When revising its mask guidance this week to urge even vaccinated people to wear masks indoors in much of the country, the Centers for Disease Control and Prevention was criticized for not citing data in making that move. Now it has — and the data is sobering. The study details a…