CDC Director: Delta variant to ‘probably’ become dominant strain in U.S.

The very contagious and possibly more harmful Delta variant of the coronavirus “probably” will become the dominant strain in the United States in the coming months, Rochelle Walensky, director of the Centers for Disease Control and Prevention, said Friday on “Good Morning America.”

“It’s more transmissible than the Alpha variant or U.K. variant that we have here. We saw that quickly become the dominant strain in a period of one or two months,” Walensky said. “I anticipate that is going to be what happens with the Delta strain here.”

Vaccines have been effective against the variant, which first appeared in India, but Walensky expressed concern that the virus could mutate and render vaccines less effective.