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How long is it appropriate to wear a kn95 mask?

Update:12 Jan
         KN95 mask is the domestic mask standard. The non-oily filter that meets the national standard reaches more than 95% of the standard. It is the KN95 mask. Some people know that the N95 mask is the American standard and the filter is greater than 95%.
1. What type of mask should be used for the current new coronavirus pneumonia?
 There are mainly three types of standards that can resist the new pneumonia virus.
1. Medical surgical masks
Medical surgical masks are in compliance with the national standard GB19083-2010 mandatory standard, the filtration efficiency is greater than 95% non-oily particulates test, and meets the penetration blood test.
2. N95 mask
N95 mask is in line with the United States NIOSH certification, non-oily particulate filtration efficiency ≥ 95%
3. KN95 mask
Comply with China's GB2626-2006 mandatory standard, non-oily particulate matter filtration efficiency is greater than 95%

2. How long can KN95 masks be used?
         Under normal circumstances, KN95 standard masks can be used for 3 days if there is no epidemic situation, but now the new type of pneumonia epidemic is more severe. The doctor’s recommendation is to replace it every 4 hours. If you go to crowded places, it is appropriate 1-2 Replace every hour.
If the KN95 mask is contaminated, such as in a crowded place or in an epidemic area, if the KN95 mask is sneezing or coughing from the other side, it is contaminated and needs to be replaced in time.
For first-line doctors in hospitals, they basically use special medical and surgical masks, goggles, and protective clothing to provide basic safety protection.
         Medical surgical masks are basically worn once and replaced when they are used next time.
Now you know how long the medical KN95 mask can be used, it can usually be used for 3 days, but in the current situation, it is recommended to replace it every 4 hours. It also depends on the surrounding environment. If you are walking in the community, do not go far. KN95 masks can be worn multiple times in some places, just change one a day, but if you are going out to a crowded place, it is recommended to change it every 4-6 hours, just 2 masks a day.

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