The highly transmissible Delta variant is the most common strain of the COVID-19 virus circulating in the U.S., new data showed, but federal health officials said fully vaccinated people don’t necessarily need to put on face masks again.
The highly transmissible Delta variant is the most common strain of the COVID-19 virus circulating in the U.S., new data showed, but federal health officials said fully vaccinated people don’t necessarily need to put on face masks again.
