Medical surgical masks have been used in preventing the spread of respiratory infectious diseases and preventing surgical infections for more than 100 years. Although masks with various or various uses have been developed and produced, and relevant standards have been formulated in many countries, until now, masks have only been promoted and used in relevant industries, but few people really understand the relevant performance of various masks, New Coronavirus's popularity this year has pushed the mask back to the front. How to wear a mask to achieve the required protective effect. Therefore, we will collect and sort out relevant data for brief analysis for reference.

According to the filter material of the protective mask, it is mainly divided into two categories, namely dust-proof and anti-virus. Their function is to absorb and block harmful aerosols, including dust, smoke, fog droplets, toxic gas and toxic vapor, without being inhaled by people. The specific concept of closing various masks is as follows.

1、 Gauze mask

Protective articles to protect respiratory tract from harmful dust, aerosol, microorganism and dust.

2、 Medical surgical mask

It can prevent the spread of blood, body fluids and splashes. It is a mask worn by medical staff during invasive operation.

3、 Medical protective mask

A mask that can prevent infection caused by airborne infection factors with a diameter of < 5um or close contact with droplet transmitted diseases.