Which brand is the real PM2.5 mask for traffic police sold on Taobao?

They are all promotion methods. It is recommended to choose masks above N95. From a professional point of view, N95/N99 is the most effective way to prevent and control the spread of severe respiratory infectious diseases, such as SARS or influenza, because the higher the filtering efficiency of masks, the greater the respiratory resistance, and the long-term wearing will also have an impact on the body.

Citizens who are sensitive to climate change can choose to wear disposable medical surgical masks or gauze masks with more than 12 layers. The sterilization grade and ordinary grade marked on the outer packaging of medical care masks refer to the cleanliness of the masks themselves, which has nothing to do with the filtration effect. The public can identify the word "drug supervision equipment" when choosing.

Cao Zhixin suggested that going out as little as possible; Wear a mask when going out to protect your body and prevent pollutants from invading your lungs through your nose and mouth; After returning from going out, you should immediately wash your face and expose your skin; Reduce outdoor activities and close doors and windows; Close the doors and windows in foggy days to avoid outdoor fog entering the room and polluting the indoor air.