This website has established that COVID face masks trap exhaled CO2 leading to elevated CO2 blood levels directly lower cognitive ability. The elevated blood CO2 levels lowers the blood PH levels making it more acidic. https://www.healthline.com/health/respiratory-acidosis#:~:text=Excess%20CO2%20causes%20the%20pH,scale%20from%200%20to%2014. and WebMD shows that it becomes a feedback look where lower PH in the blood causes CO2 to flood the lungs, https://www.webmd.com/lung/what-is-respiratory-acidosis but with nowhere to go because of the masks the CO2 levels increase in the blood which lowers PH levels further, This can cause shock to the kidneys, where the kidneys try to reduce the CO2 levels by increasing urine production, other physical symptoms of lowered PH levels in the blood include Strokes or other cerebrovascular accidents
Medications that slow down the nervous system like opioids, benzodiazepines, and pain medication
Myasthenia gravis, which is when your voluntary muscles become weak, or you lose control of them.
Muscular dystrophy, a group of diseases that interfere with your gene's ability to make muscle and cause you to steadily lose your muscles.
Guillain-Barre Syndrome, a very rare neurological disorder in which the immune system attacks itself. This can cause problems from trouble eating to full body paralysis.
Blocked airways
Cardiac arrest (heart attack)
Psychological effects of lowered PH levels in the blood include Cognitive Impairment https://www.nature.com/articles/srep20833 increased instances in panic, anxiety and depression https://now.uiowa.edu/2012/05/acid-brain
increased CO2 concentrations leading to lower blood PH number and thus more acidic blood concentrations have also been linked to increased acts of violence https://pubmed.ncbi.nlm.nih.gov/31430264/ and https://molekule.science/what-is-stale-air/ Thus the mask mandate increases the chances of violent passengers on aircraft or in society in general. The science is pointing in that direction However the FAA seems to be ignoring that. Most of the comments such as this one call the FAA a science denying agency
https://twitter.com/robbystarbuck/status/1392948128383447044 Another tweet calls out the double standard in mask enforcement where ordinary citizens are fined over $10k for not wearing a mask but not John Kerry
https://twitter.com/SantasTavern/status/1392954189723148290 with another tweet stating the FAA seems to make it's own rules even if they violate regulations from the US government. https://twitter.com/Travelnpack/status/1393027314796187650 and that the FAA looks the other way with regards to mask trapped CO2 being rebreathed https://twitter.com/Nick_GenX/status/1392974526749810690 that they are a non-medical agency dictating health policy https://twitter.com/Keepyourviews/status/1392991932150861829 and that government agencies only follow the science if it fit their political needs https://twitter.com/braedonsaunders/status/1392950710216560648
This goes beyond the FAA where the devolving of modern society during 2020 including the nationwide riots can be linked to masks which trap CO2 elevating the the CO2 levels in the blood which lowers the PH level of blood making it more acidic. The body panics and tires to elevate this to raise PH levels that it dumps the excess CO2 in the lungs that are then trapped by the facemasks and is rebreathed. The Kidneys try to compensate by increasing the amount of urine produced but the levels still adversely affect ones brain by lowering cognitive ability, increasing stress and anxiety. The general reduction of higher level brain functions leads and increased stress leads to an "primitive response" where society degenerates into violence and regresses in societal sophistication.
It's even more detrimental to children. 225% increase in concerning incidents, between the lockdowns and the masking of children, it's dramatically affecting their metal health for the worse. https://www.kxan.com/news/education/online-screening-company-sees-225-increase-in-concerning-incidents-with-texas-students/
The masks are preventing people from being able to observe facial expressions which especially in children is causing developmental stunting on speech and a rise in the symptoms of autism. https://www.youtube.com/watch?v=aTUcxR9PAY4