Scientists who studied a big COVID-19 outbreak in Massachusetts concluded that vaccinated people who got so-called breakthrough infections carried about the same amount of the coronavirus as those who did not get the shots.
Nation and World
Federal workers will be required to attest they’ve been vaccinated against the coronavirus or else face mandatory masking, weekly testing, distancing and other new rules.
The new mask guidance follows recent decisions in Los Angeles and St. Louis to revert to indoor mask mandates amid a spike in COVID-19 cases and hospitalizations.
