Then all of the “professionals” are suffering from “hypercapnia” (or from fake/exaggerated reports).
From the CDC.
https://www.cdc.gov/coronavirus/2019-ncov/prevent-getting-sick/diy-cloth-face-coverings.html
Use of Cloth Face Coverings to Help Slow the Spread of COVID-19
Printer friendly versionpdf icon
How to Wear a Cloth Face Covering