Quoted: The CDC based their recommendation on new evidence about the delta variant. Ajay Sethi, associate professor of population health sciences at the University of Wisconsin-Madison School of Medicine and Public Health, said he would classify the latest science as “a bit of a game-changer.”
“We didn’t know this was going to be the case until we discovered that people who are vaccinated and get a breakthrough infection can potentially spread that to other people and that wasn’t the case before delta,” Sethi said.