Masks are not only useless against respiratory viruses, they also cause a multitude of scientifically documented adverse effects.  These side effects include: labored breathing, decreased oxygen, increased carbon dioxide, infection hazard, psychological harm, headaches, skin damage, heightened fatigue, and mechanical communication impediments.  This is by no means an exhaustive list of adverse effects.  Please download the large, poster size PDF below and take a look for yourself.

ADVERSE EFFECTS FROM WEARING MASKS