Fauci told Jonathan Karl on ABC’s "This Week" that despite filtration systems on board airplanes, it would be "prudent" for passengers to take the "extra step" within the enclosed space and wear a mask.
"I think when you're dealing with a closed space, even though the filtration is good, that you want to go that extra step when you have people -- you know, you get a flight from Washington to San Francisco, it's well over a five-hour flight," Fauci said, when asked he believed there would be a post pandemic point when passengers will not have to wear masks on flights.
"Even though you have a good filtration system, I still believe that masks are a prudent thing to do, and we should be doing it," he added.