Is Wearing a Face Mask Bad for Your Immune System?

Right now, wearing a mask has become necessary during the Coronavirus pandemic. Infectious disease experts agree that when combined with social distancing, eye protection, and frequent hand washing, facial coverings can slow the spread of the virus. Now, from made-at-home cloth masks to more rigid N95 masks, people are out and about making facial coverings an everyday activity.

But some people say wearing a mask reduces oxygen supply. If this is true, then it could prove fatal due to one’s own carbon dioxide exhaled while breathing. Low oxygen can leave them to feel light-headed, smothered. It is a real and genuine concern for people. But is it true?