It reduces outward spray and subsequently less droplets on surfaces. It also reduces the inward inoculum from others which has an effect on disease severity and the ability of your immune system to clear a lower viral load mitigating symptoms.renegadeavenger wrote: ↑ I like how on official uniqlo site, states. This is a non medical grade mask. And does not prevent the transmission of diseases. Made out of originally underwear materials from uniqlo, what use is this mask if it doesn't protect yourself or others?
Medical masks are used in clinical settings to help reduce exposure to blood, bodily fluids and different pathogens. The hospital provides a variety of masks based on risk. In office environments, staff wear non-medical masks.