Mask Test on Child Shows Harm

​Carbon dioxide levels between 2,000 ppm and 5,000 ppm are associated with headaches, sleepiness, poor concentration, loss of attention, increased heart rate and slight nausea. The maximum permissible daily exposure limit is 5,000 ppm. Wearing a standard surgical mask, carbon dioxide levels  reached above 8,000 ppm, although it took longer. Shockingly, wearing a cloth bandana resulted in carbon dioxide buildup near the nose and mouth exceeding 8,000 ppm. A 2018 study, "Hypoxia Downregulates Protein S Expression," also describes how hypoxia (low oxygen concentration) increases your risk of blood clots by reducing protein S, which is a natural anticoagulant. Wearing a mask, especially for long periods of time, may reduce your oxygen concentration, and considering COVID-19 is associated with abnormal blood clotting, inducing hypoxia may be ill advised.