Rochelle Walensky also said Friday that she expects delta to become the dominant variant in the United States and urged people to get vaccinated.
"As worrisome as this delta strain is with regard to its hyper transmissibility, our vaccines work," Walensky told the ABC program "Good Morning America." If you get vaccinated, "you'll be protected against this delta variant," she added.Health experts say the delta strain is particularly worrisome for young people, many of whom have yet to get vaccinated.Paul Offit, director of the Vaccine Education Center at Children's Hospital of Philadelphia, said the delta variant has essentially replaced alpha, the variant that swept across Europe and later the U.S.