The Centers for Disease Control and Prevention (CDC) now predicts that the Delta COVID-19 variant is the dominant strain in the U.S., having overtaken Alpha to account for 51.7% of infections, according to the latest data.

The Centers for Disease Control and Prevention (CDC) now predicts that the Delta COVID-19 variant is the dominant strain in the U.S., having overtaken Alpha to account for 51.7% of infections, according to the latest data.