With no end in sight to the novel coronavirus COVID-19 pandemic in the US, it's no surprise that myths about the virus abound.<br />According to Business Insider, one common myth is that wearing a mask is dangerous because you'll get carbon dioxide poisoning.<br />But epidemiology professor Stephen Morse says any CO2 the wearer exhales passes through the mask, just like oxygen, and doesn't build up.<br />After all, healthcare workers wear masks for hours on end, which is proof that mask-wearing does not cause carbon dioxide poisoning or toxicity.<br />Furthermore, blood oxygen levels remain perfectly normal when wearing a mask, provided the wearer is healthy.
