Generally refers to the equipment worn on the nose and mouth to filter the air in and out of the nose to prevent harmful gases, odors, and droplets from entering and exiting the wearer's nose and nose. They are mostly made of cloth or paper, and should be used after each use. throw away.
Surgical masks or medical masks are a series of devices worn on the nose and nose to prevent harmful substances from entering the wearer's mouth and nose; or to prevent the wearer's respiratory secretions from contaminating others or the environment. They are mostly used by medical personnel and are also used by It is widely used to prevent the spread of respiratory infections such as severe acute respiratory syndrome and influenza. In Asian cities, similar masks are also used in daily life to block smoke and dust.
Most people think that surgical masks or similar masks can filter harmful substances in the air, but in fact, the main purpose of the design of surgical masks is to block the wearer's nose and nose droplets, and the ability to filter particles in the air is extremely limited, let alone filtering. Harmful gases in the air. In Japan, it is common for people to wear masks in public while they are ill. This can prevent the spread of the disease, and some people often wear masks for other purposes. In Hong Kong and Macau, their health departments also encourage people to wear them to prevent respiratory infections, and they are generally accepted. However, the US Centers for Disease Control and Prevention is skeptical that surgical masks can prevent respiratory infections among wearers, and people in Europe and the United States rarely wear masks.
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