Currently, three types of face masks are commonly used to prevent pneumonia caused by covid-19 viral infections. They are Medical disposable masks, kn95 masks and N95 face masks. Medical disposable surgical masks are recommended to be replaced approximately every 4 hours. The medical disposable masks can mainly isolate 80% of the droplets containing viruses, but Kn95 face masks can filter about 90% of the droplets and kn95 masks is relatively scarce, and most regions are still recommended for medical personnel.
N95 fftp3 face masks can protect people working in spaces with high concentrations of particulate matter from particulate matter. Because many pathogens such as bacteria and fungi can exist in the form of particles, you can also prevent infectious diseases by wearing n95 face masks. The minimum diameter of particles blocked by n95 face masks is more than 0.075 ± 0.020 μm, which is already nanoscale. Ordinary surgical masks also have very good protective effects, and are mainly used by medical personnel in clinical applications.
The manufacturing standard of this face mask is a domestic manufacturing standard. Generally, for 3m face masks, the filtration rate of particulate matter should be greater than or equal to 95%. For masks with n95, the filtration rate should be greater than or equal to 90%. In the current situation, no matter which type of face mask is worn, it will protect the body from filtering out bacterial viruses and tiny particles. Try to wear some high-quality madefacemasks face masks, the effect will be more obvious.