endIndex:
(CNN) -- With Covid-19 cases rising and the Delta variant gaining increased prevalence in the United States, health experts are reiterating that vaccines are effective in the ways that matter most: preventing severe disease, hospitalization and death.
Speaking to CNN's Jim Acosta on Saturday, Dr. Anthony Fauci said the vaccines are shown to be "highly effective in preventing symptomatic, clinically apparent disease."
"When you start seeing what's called breakthrough infections, if you look carefully at them, the overwhelming majority of those are people who either have no symptoms or only very mild symptoms," Fauci said. "So the vaccines are still very, very effective in preventing severe disease."