yes, we have looked at masks for decades. not specifying talking about the benefit for the wearer or others around, source control. they don t show any benefit if that circumstance. that s the only one there is any policy to be concerned with. for personal protection, each person has the chase choice to wear a mask or not laura: they had one smart writer who debunked the study to push masks in school. saying you can t learn anything about the effects of school mask mandates from this study. he said a co-author of the review of covid-19 mitigation policies called the research so unreliable, it should not have been entered into the public discourse at all.