Ensure that hands are clean when wearing and removing the mask. If you plan to reuse the mask, store it in a dry, clean, ventilated area or keep it in a clean, breathable paper bag. Masks need to be stored separately to avoid contact with other people’s masks. During the pneumonia epidemic of novel coronavirus infection, masks are more scarce. When masks are properly worn and stored, they can be used for a longer and more frequent period of time. Masks need to be replaced promptly if they are dirty, damaged, or have an odor that makes breathing difficult. Content source: Dr. Yurai