"Blaylock: Face Masks Pose Serious Risks To The Healthy...17 of the best studies were analyzed, concluded that, " None of the studies established a conclusive relationship between mask/respirator use and protection against influenza infection."1 ...When a person is infected with a respiratory virus, they will expel some of the virus with each breath. If they are wearing a mask, especially an N95 mask or other tightly fitting mask, they will be constantly rebreathing the viruses, raising the concentration of the virus in the lungs and the nasal passages. "