Killer COVID-19 Masks? The Truth About Trapped Carbon Dioxide
Jun 22, 2020·An N95 mask could possibly cause: Hypoxia: When body tissue does not get enough oxygen. Hypercapnia: Elevated levels of carbon dioxide in the blood that can cause dizziness, shortness of breath, headache and, in extreme cases, hyperventilation, seizures and possible death. But even an N95 mask is unlikely to produce such extreme reactions.