Those are the words from CDC director Dr. Rochelle Walensky in a recent interview with Scripps National Correspondent Dan Grossman. It can be a startling confession to hear, but one Dr. Walensky ...

The more contagious Delta variant of Covid-19 now makes up 83% of sequenced samples in the United States, US Centers for Disease Control and Prevention Director Dr. Rochelle Walensky said Tuesday.

SAN FRANCISCO (KGO) -- The Centers for Disease Control and Prevention (CDC) released new data Friday indicating the Delta variant is twice as infectious as previously thought, and a recent analysis ...

As the delta variant continues to spread in countries around the world, some COVID-19 safety restrictions have been reinstated in efforts to curb the rising cases. But the director of the U.S. Centers ...

ATLANTA, Ga. — The delta variant that’s now the dominant strain of coronavirus in the U.S. appears to be as transmissible as chickenpox, according to an internal document from the Centers for Disease ...

Vaccine effectiveness against COVID-19 infection dropped from 91% to 66% once the delta variant accounted for the majority of circulating virus, according to a study published Tuesday by the U.S.