But the estimated 83 million vaccinated Americans who haven’t gotten a booster are “more and more vulnerable every day to infection and potentially serious illness with their waning immunity,” he said.

Bob Wachter, chairman of the University of California, San Francisco Department of Medicine, told Axios he expects vaccine mandates will soon include requiring boosters.

“If there is some level of immune evasion, but the vaccines continue to have some level of efficacy — which I think is likely — I think the ‘boosters as part of mandate discussion’ moves from a multi-month discussion to a multi-week discussion,” Wachter said…

“It won’t blow vaccines away, but it could compromise protection to a degree that is yet unquantifiable,” Cornell virologist John Moore told Axios. “It would make sense for anyone who’s been holding off on getting their booster to do so because it will give an additional kick to antibody levels.”