https://jamanetwork.com/journals/jamapediatrics/fullarticle/2781743?appId=scweb Research Letter June 30, 2021 Experimental Assessment of Carbon Dioxide Content in Inhaled Air With or Without Face Masks in Healthy Children A Randomized Clinical Trial Harald Walach, PhD1; Ronald Weikl, MD2; Juliane Prentice, BA3; et alAndreas Diemer, PhD, MD4; Helmut Traindl, PhD5; Anna Kappes, MA6; Stefan Hockertz, PhD7 Author Affiliations Article Information JAMA Pediatr. Published online June 30, 2021. doi:10.1001/jamapediatrics.2021.2659 Many governments have made nose and mouth covering or face masks compulsory for schoolchildren. The … Read more