The standards that masks should meet during an epidemic are:
Conforms to China's GB19083-2010 standard filtration efficiency of 95% (non-oily particulate matter test). Required to pass the synthetic blood penetration test (anti-body fluid splash) and meet microbiological indicators.
N95 mask for the U.S. NIOSH certification, non-oily particulate matter filtration efficiency of 95%. KN95 masks are in line with the mandatory standards 626 grand particulate matter filtration efficiency ≥ 95%. Generally made of nonwoven materials, including filter layer, mask strap and nose clip. Standard medical surgical masks are divided into 3 layers, the outer layer has a water-blocking effect, which can prevent droplets from entering the inside of the mask.
The importance of wearing a mask during an epidemic and occasions are:
1. Masks are an important line of defense against respiratory infections and can reduce the risk of new coronavirus infections. Masks can not only prevent patients from spraying droplets, reduce the amount of droplets and the speed of spraying, but also block the virus-containing droplet nuclei to prevent the wearer from inhaling.
2. For individuals, the protective effect of vaccination is not 100%, and it takes some time to produce protective antibodies; for groups, without the formation of an immune barrier, the new coronavirus is still easy to spread. Therefore, at this stage, some preventive and control measures should still be adhered to, including wearing masks, maintaining social distance, washing hands frequently, ventilation and other protective measures.
3, in the air circulation is not good place, such as closed transport aircraft, high-speed rail, subway, bus, etc., closed public **** place such as taking the elevator so that the ventilation is not very good place, to wear a mask.
4, to the hospital or accompanied by friends and relatives to see a doctor, in the hospital environment must wear a mask.
5, in the public **** service window, like the supermarket cashier, bank counter these places to wear a mask.