An important measure for protection against new coronavirus pneumonia is to wear masks, such as surgical masks and N95 masks.N95 masks are basically sufficient for general public protection, and have a fairly strong droplet isolation effect under standardized wearing conditions, but N95 masks are generally worn by medical personnel when there is a relatively high risk of contact with patients. For the general population, wearing ordinary surgical masks is sufficient, but, in addition to wearing surgical masks, it is also necessary to do diligent hand washing, minimize the number of people gathering places, maintain a distance of more than 1m in contact with people, and pay attention to coughing etiquette, etc., in order to prevent the new coronavirus pneumonia. Source: Dr. Yurai