Video: OSHA Says Masks Don't Work and Violate OSHA Oxygen Levels
OSHA says Cloth Masks and Surgical Masks Don't Work. Source:
OSHA defines oxygen deficient atmosphere as below 19.5%. Source
OSHA example of shipyard, where "oxygen deficient atmosphere is leading cause of fatalities. Source
CAL-OSHA states, "Cloth face covers are not protective equipment and do not protect the person wearing a cloth face cover from COVID-19." Source
