Gold-standard CO2 monitoring study: Short-term surgical mask usage→inhaled CO2 levels ≥5000ppm in 90% of 10-18yos= UNACCEPTABLE/FORBIDDEN level for workers due to its freq assoc w/ "headache, nausea, drowsiness, rhinitis, & ↓ed COGNITIVE PERFORMANCE" https://t.co/P3vyRDpQ0Q pic.twitter.com/eifcCxz1vQ
— Andrew Bostom, MD, MS (@andrewbostom) May 12, 2022
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