What is the purpose of wearing N95 masks?

To answer this question, we must first clarify the purpose of wearing masks, and secondly, clarify the working principle of masks. We know that the transmission of the new coronavirus is mainly droplet transmission and contact transmission. Therefore, the first purpose of wearing a mask is to block the spread of droplets, prevent the spread of secretions sprayed by the patient, and prevent bacteria and viruses from inhaling them into the respiratory tract through the mouth and nose, so the mask serves as a barrier protection.

In addition, surgical masks or N95 masks have a filter layer in the internal structure of the mask, which can filter out very small particles, such as bacteria and viruses, which can all be filtered out, so wearing a mask has a protective effect.