recommends everyone ages 2 and up wear masks in school regardless of vaccination status. joining us now is the director of the duke center for health policy at duke university. he's also a former fda commissioner and serves as an independent director on johnson & johnson's board. thank you, doctor, for being here. i have questions about boosters in just a moment for you. first, just your reaction to this battle over masks in schools. >> well, it's a serious issue. as you said, we're seeing lots of cases turn up, turning up in kids going back to school. these are mainly cases that are happening in the community because we have so much covid transmission. all across the united states right now. but we've seen there's good evidence if you take four steps in schools, one get as many people vaccinated as possible, the teachers, staff, students who are old enough. two, have testing support for detecting cases that aren't symptomatic. three, good ventilation and some