Because the new coronavirus is a virus transmitted through droplets, there is no constant standard for masks, including diagnostic and treatment programs do not recommend specific types of masks, but the prevention of droplets certainly need to be isolated, in order to truly prevent droplets from splashing others or splashing themselves. Frontline medical personnel, in the ward inside the face of the patient requires strict protection, the stronger the closure of the better, so N95 is a very good choice, due to good sealing, and filtered power capacity is also the best, but also easier to popularize. If the intensity is greater, there are masks that can achieve 99% closed or even 99.97% closed effect, but need to consider the degree of breathability, if it affects the normal work is also not suitable. Ordinary people if you normally wear N95, it will be very uncomfortable indeed, because it will be difficult to breathe, such as mask sealing is too strong, for patients with chronic lung disease, heart disease patients, asthma patients are not suitable. Source: Dr. Yurai