MSNBC All In With Chris Hayes September 25, 2021 00:40:00
That masks in school work. we only had in school districts six weeks of school and we had 1,800 schools closed, nearly 1 million children have been out of school because of school closures. but the study you're referring to in arizona demonstrated that schools that had masks were 3.5 times less likely to have a school outbreak than schools that didn't have masks. >> just as a follow-up, are we sure that's not a correlation issue and not a causation, that they're the ones most inclined to not have a masking policy? >> and that's actually been studied as well and we've examined those correlation...