Delta most common COVID-19 variant in US, data show
https://healthell.blogspot.com/2021/07/delta-most-common-covid-19-variant-in.html
Delta most common COVID-19 variant in US, data show
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.
