Many governments have made nose and mouth covering or face masks compulsory for schoolchildren. The evidence base for this is weak. The question whether nose and mouth covering increases carbon dioxide in inhaled air is crucial. A large-scale survey in Germany of adverse effects in parents and children using data of 25 930 children has shown that 68% … Continue reading Experimental Assessment of Carbon Dioxide Content in Inhaled Air With or Without Face Masks in Healthy Children – JAMA