What people fail to understand is that
@Lokmar is right. Viruses, bacteria and germs are microscopic and can easily pass through material. Of course, if you wear a mask and cough, it will prevent some of the "droplets" from entering the air outside the mask but what people fail to realize is that once the virus is airborne it can slip through pretty much anything. Including a mask. Masks aren't 100% effective. They aren't even effective enough to keep most of the microscopic droplets from hitting the air. I majored in science/biology/chemistry in college, btw.....so if anyone wants to argue with me about this, please make damn sure you know wtf you're talking about.