During the epidemic, people bought masks crazily. What was the original use of the mask when it was invented?

This year, everyone is living a different year. Every household is shut at home and no one can go out. And uncharacteristically, masks and disinfectant have also become the new year's goods this year. For their own safety, to prevent themselves from being infected by the virus, they frantically put on masks, and now masks have become a tight thing, which is in short supply. We all know that people buy masks to resist the spittle of those virus carriers and ensure their health, so we will think, what was the mask originally invented for? Let's take a look today.

The first one is to keep out the cold. As we all know, the previous technology is not very developed, and it still belongs to a relatively backward stage. That's not true. If it is cold, you can turn on the air conditioner to blow air. At that time, there was no such condition, so we could only make a fire to keep warm, or drink some warm soup to keep warm, just like in ancient times. However, traveling is a problem. At that time, you would choose to wear a mask when driving. At this time, the mask will play a role in resisting the cold wind, and the cold wind will not enter your mouth.

The second is to prevent droplets from entering the respiratory tract. Society is always progressing slowly, and then people gradually discover the existence of bacteria, some of which will spread from person to person. In order to prevent some patients from being infected by germs carried by sneezing and saliva, patients need to wear masks at this time, so that their germs can be isolated from healthy people. So that some diseases such as respiratory tract will not be transmitted to others.

The above is my own opinion. If you have other ideas, please discuss with me.