https://www.lewrockwell.com/2020/07/no_author/warning-about-danger-of-masks/

MASKS - Oxygen level - O2 level drops behind mask - test
http://stateofthenation.co/?p=17754

READ THIS FIRST BEFORE EVER WEARING A MASK (WARNING UPDATE) 
Except for healthcare providers and when in high-risk venues, no one should be wearing a mask.“People, take off your masks before you really make yourself sick!”—
The Coronavirus Coach
Most masks are quite unhealthy and some are even disease-promoting—Here’s why!

Chemical Off-gassing
Those who are manifesting COVID-19 symptoms have a greater need for fresh clean air. Because of the various respiratory illnesses associated with Coronavirus syndrome they require fresh air more than anything. So do folks who want to prevent catching the coronavirus. However, when wearing a synthetic mask the person is filtering their air through a synthetic material that outgases the petrochemically derived constituents that most are made of. The masked individual is then breathing in those aerosolized toxic chemicals.

PRE-EXISTING CONDITIONS
Many of the sickest COVID-Syndrome patients already have various respiratory illnesses and/or chemical sensitivities, so putting a mask on them is the worst thing that can be done. The same applies to people who are relatively healthy but have E.I. syndrome or MCS.**E.I. Syndrome = Environmental Illness Syndrome & MCS = Multiple Chemical Sensitivity.  Brand new products just taken out of a box are notorious for outgassing various chemical toxins. In the case of a new mask, which is placed right over the mouth and nose, these airborne chemicals go right into both airways. Therefore, patients stricken with the novel coronavirus ought to be spared from such a misguided practice. A chemical overwhelm can even trigger a respiratory condition that compels the attending physician to put the patient on a ventilator which ought to be strictly avoided for COVID-Syndrome patients.

KEY POINT about VENTILATORS:
Venting COVID-Syndrome patients has proven to be injurious to the lungs and often deadly, as several doctors and nurses have testified. Five medical school professors in Italy have also correctly pointed out the extreme risks of ventilators in this scientific research paper: Covid-19 Does Not Lead to a “Typical” Acute Respiratory Distress Syndrome

Oxygen & Carbon Dioxide
With each and every in-breath, the sick individual is also intaking some of the carbon dioxide they just exhaled.Instead of breathing in fresh clean air full of oxygen, the mask is diminishing their oxygen intake and replacing it with the respiratory waste product—carbon dioxide.By subtly decreasing their oxygen levels in this manner they are being deprived of the most powerful healing agent for respiratory diseases—Molecular oxygen (O2). Furthermore, even a slight increase of the carbon dioxide levels in their bloodstream can contribute to anxiety and feelings of nervousness as well as cause headaches, dizziness and fatigue.The flip side of the very same problem is that prolonged mask wearing can lead to oxygen deprivation also known as hypoxia. See: Physician Warns About Prolonged Mask Wearing and Hypoxia  For these reasons especially, both the healthy and the ill should avoid wearing a mask like the plague … … … otherwise you may end up getting this coronavirus symptoms.

Unhygienic and Unsanitary
Even after wearing a mask for a short period of time it becomes filthy. The more polluted the indoor and/or outdoor ambient air is, the quicker the mask will become contaminated. Not only is the mask capturing particulate and chemical pollution from the ambient air, the accumulation of these throughout the course of a day further obstructs the necessary breathing process. Hence, the longer a mask is worn in a polluted environment, the dirtier and more contaminated it will become. Just take a close look at the return air filter in your home or garage if you want to see what’s happening with a well-worn mask; albeit, on a much smaller scale. Now let’s add into the mix the constant coughing and sneezing and spitting up phlegm and mucus. What will inevitably develop regarding the mask is a worst-case scenario that can push the patient onto a ventilator. This is only one reason so many hospital inpatients are being vented; the inappropriate treatment plans also include specific pharmaceutical drugs that are strongly contraindicated for Coronavirus syndrome.

Damage the Immune System
The following excerpt was taken from this article published by the Alachua Chronicle in Gainesville, Florida: Face masks can damage the immune system. Stress can lower Your immunity. A face-covering or mask that interferes with respiration can add to stress. Cortisol is a hormone closely linked with stress. It works as a key player in the body’s stress response and is often measured in research as an indicator of stress. Cortisol plays a vital role in the body’s functioning; it’s secreted by the kidney’s adrenal glands. But high and sustained blood levels of cortisone in individuals stressed by the fear of COVID-19 [a virus that doesn't exist -ed.] can trigger serious and emergent health issues. Higher and more prolonged levels of cortisol in the bloodstream (such as those associated with chronic stress) have been shown to have negative effects, such as:

• Impaired cognitive performance
• Suppressed thyroid function
• Blood sugar imbalances such as hyperglycemia
• Decreased bone density
• Decrease in muscle tissue
• Higher blood pressure
• Lowered immunity and inflammatory responses in the body, slowed wound healing, and other health consequences
• Increased abdominal fat, which is associated with a greater amount of health problems than fat deposited in other areas of the body. Some of the health problems associated with increased stomach fat are heart attacks, strokes, developing metabolic syndrome, higher levels of “bad” cholesterol (LDL) and lower levels of “good” cholesterol (HDL), which can lead to other health problems.