Published Nov 10, 2023 at 13:07pm ET
These masks originally developed in 1917, during World War I, when soldiers on all sides began to use various forms of gas masks to protect themselves from chemical weapons like chlorine and mustard gas. NIOSH N95 masks for sale NIOSH the health risks of particulate pollution. N95 manufacturer china N95 dust mask manufacturer if this is the case, the answer is three months. Think of the flu as the other cold, and you'll see why people wear N95 masks to protect themselves from it, especially if they have asthma or some other breathing condition that makes them more susceptible to respiratory infections. That's why it's important to understand the difference between N95 and KN95 masks. Called Respiratory Protection Effectiveness Number ( RPE ) .