CNN's Dr. Leana Wen is one of many "experts" whose opinions have shifted on the science of COVID-19 stating, "the science has changed" surrounding the pandemic.

"There was, and is, a time and place for pandemic restrictions. But when they were put in, it was always with the understanding that they would be removed as soon as we can. And, in this case, circumstances have changed. Case counts are declining. Also, the science has changed," Wen told CNN host John Berman.

She also added, "We should also be intellectually honest and say that masking has had a cost. Especially for the youngest learners."