According to the Centers for Disease Control and Prevention (CDC), wearing a mask can help slow down the spread of the virus, especially in high-risk situations. The 3 ply mask is made of three layers of materials that filter out particulate matter and other small particles. These masks are designed to fit comfortably around the face, ensuring maximum coverage and protection.
The validity period of unopened medical masks is 2-3 years. The specific production date and expiration date, or restricted usage period, should be visible on the outer packaging of the medical mask. Expired medical masks cannot effectively prevent bacterial and viral infections, therefore they cannot be used.
N95 masks have a preference for isolation compared to disposable medical masks. It is best for healthcare workers to choose medical masks or nN95 masks, as N95 masks can only isolate viruses on the surface of the mask. It is recommended not to excessively compress the mask when wearing it to avoid virus droplets getting wet through the mask, which can easily cause virus infection.
An N95 mask's material and filtration ability aren't “going to degrade unless you physically rub it or poke holes in it,”
N95 respirators protect against exposure to airborne particles.
Medical surgical masks are divided into three layers: the outer layer is a water-blocking layer (anti-adhesive non-woven fabric), which can block splashing liquid.