Airline CEOs state that the air in a pressurized aircraft is cleaner than a Hospital ICU due to the inbuilt HEPA filtration systems and how quickly the air is cycled and replaced. https://www.thegatewaypundit.com/2021/12/masks-dont-add-much-additional-protection-against-covid-southwest-ceo-sparks-backlash-after-questioning-the-need-for-masks-on-planes-video/ The CEOS state that the masks thus offer little to no protection against the COVID virus transmission. The CEOs stop short of stating that individual air quality is decreased due to the face masks trapping one's exhaust breath that includes cognitive robbing CO2.