> I'm curious how much the type of mask matters. I have two kinds of masks for construction projects: There are surgical masks, surgical respirators, and regul

> I'm curious how much the type of mask matters. I have two kinds of masks for construction projects: There are surgical masks, surgical respirators, and regular respirators. Surgical masks and surgical respirators meet regulatory requirements about blocking pathogens from the wearer, and I haven't seen any of that type with an exhaust valve.