You must wear a mask when working and living in a polluted environment. If you have respiratory infectious diseases, you can also wear a mask to prevent infection. It can not only isolate dust, bacteria and smog in the air, but also protect the respiratory tract. When the weather is cold, you can also wear a mask to isolate the cold air, which can play a role in preventing cold and keeping warm. The facial mask is a sanitary product, which can be worn on the nose and mouth.
It can filter the air entering the nose and mouth, thus reducing the spread of the virus, especially during the epidemic, and the mask plays an irreplaceable role.
A brief history of development
Jin Yi's Chasing the Old Horse: "At this time, he told me to pull up the mask and cover my nose to prevent flying flowers from getting into my nostrils."
Official guide to wearing masks for public science
China is the first country in the world to use masks. In ancient times, in order to prevent dust and respiratory pollution, people in the court began to cover their mouths and noses with scarves. For example, Li Shu said, "Cover your mouth, you are afraid of meeting someone." "Mencius Li Lou" Note: "If the calligraphy is unclean, everyone will cover his nose." It is very unsanitary to cover your nose with your hands or sleeves, and it is inconvenient to do other things. Later, some people covered their mouths and noses with a piece of silk. Kyle Poirot described his 17-year experience of living in China in his book The Travels of Marco Polo. One of them said, "In the palaces of the Yuan Dynasty, people who offered food covered their mouths and noses with silk to let them breathe and not touch the food." This silk cloth covering the nose and mouth is also the original mask.
/kloc-At the beginning of the 3rd century, masks only appeared in the court of China. In order to prevent his breath from touching the emperor's food, the waiter made a mask with a towel made of silk and gold thread.
/kloc-at the end of 0/9, masks began to be used in the medical field. German pathologist Ledek began to advise medical staff to use gauze masks to prevent bacterial infection.
At the beginning of the 20th century, masks became a necessity of public life for the first time. The Spanish flu that swept the world killed about 50 million people, and ordinary people were asked to use masks to resist the virus.
In the middle and late 20th century, masks were widely used. In the history of influenza, masks have played an important role in preventing and blocking the spread of germs.
1897 In March, Medesi, Germany introduced a method of covering the nose and mouth with gauze to prevent bacterial invasion. Later, someone made a six-layer gauze mask and sewed it on the collar. When in use, just turn it over and cover your nose and mouth. However, it is extremely inconvenient to hold this mask with your hands all the time. Later, someone came up with a way to tie the strap to the ear, which became a mask that people often use today.
19 10, plague broke out in Harbin, China, and Dr. Lian Dewu, then deputy director of Beiyang Army Medical College, invented the "Wu's mask".
In 2003, the use and popularization of masks reached a new climax. A SARS epidemic almost made masks out of stock. There are long queues in front of major pharmacies, and people are scrambling to buy masks.
In 2009, following the "bird flu" in 2004, "Influenza A H 1N 1" made the mask army appear again in front of the cameras of major news media in the world.
The appearance of the concept of air hazard in 2065 438+03pm 2.5 has aroused public concern about air pollution, and also made protective equipment such as masks sell well during the foggy weather.
On February 7th, 2020, in the Disinfection Supply Center of the Second Affiliated Hospital of Xi Jiaotong University, more than 30 medical staff and volunteers made masks with medical packaging non-woven fabrics, absorbent paper for instruments, N95 meltblown filter cloth and other materials. [3]