Mask n95意思

"N95" is a rating assigned by the National Institute for Occupational Safety and Health (NIOSH), which is part of the Centers for Disease Control and Prevention (CDC) in the United States. It is a designation that indicates the mask is capable of filtering out at least 95% of very small (0.3 micron) particles. These particles include viruses and bacteria, making N95 masks effective in preventing the spread of diseases.

The "N" in N95 stands for "not resistant to oil," which means the mask is designed for use in environments where there is no oil-based particulate present. If oil-based particles are present, an "R" or "P" rating would be more appropriate. The "95" means that the mask blocks at least 95% of very small (0.3 micron) test particles.

N95 masks are designed to fit tightly around the nose and mouth, creating a seal that prevents unfiltered air from entering. This makes them different from surgical masks or cloth face coverings, which are looser fitting and do not necessarily provide the same level of protection.

N95 masks are typically used in healthcare settings, construction, and other industries where workers are exposed to airborne particles. They are also recommended for use during respiratory outbreaks, such as the COVID-19 pandemic, to help reduce the spread of the virus.

It's important to note that N95 masks should be used properly and fit properly to be effective. Improper use or a poor fit can allow unfiltered air to enter, reducing the mask's effectiveness.