versus in the upper income areas, it was just 18%. lower income and minority groups were hit the hardest, at least when it comes to children learning. >> harry enten, i appreciate it. fascinating to look at the numbers. perspective from dr. danny benjamin, distinguished chair of the abc science collaborative. appreciate you joining us. some schools in multiple states around the country are shifting to online learning or pausing the return to in-person learning to a few days to a few weeks. do you think that will protect students from becoming infected with covid or is keeping the schools open better? >> keeping schools open is undoubtedly better. there's four reasons for that. in the masked environment, we know that there's no data that