“The largest concern that I think we in public health and science are worried about is that virus and the potential mutations. We have a very transmissible virus, which has the potential to evade our vaccines in terms of how it protects us from severe disease and death,” Walensky said.
“Right now, fortunately, we are not there. These vaccines operate really well in protecting us from severe disease and death. But the big concern is the next variant that might emerge, just a few mutations potentially away, could potentially evade our vaccines.”
The guidance is a reversal of the advisory the agency issued in May, which stated that fully vaccinated people didn’t have to wear masks indoors and in most other settings.
“We are dealing with a much different strain of this virus than we were even earlier in the spring, back in May, when the masking guidance was done—provided by the CDC at that time,” White House press secretary Jenn Psaki told reporters on July 27, addressing questions about the variant and the new CDC guidance.
“Their job is to look at evolving information, evolving data, an evolving historic pandemic, and provide guidance to the American public.”