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For those who are collecting respiratory specimens from, caring for, or transporting COVID-19 patients without any aerosol-generating procedures, WHO recommends a surgical mask, goggles, or face shield, gown, and gloves. If an aerosol-generating procedure is performed, the surgical mask is replaced with an N95 or FFP2 respirator. [22]
An N95 respirator is a disposable filtering facepiece respirator or reusable elastomeric respirator filter that meets the U.S. National Institute for Occupational Safety and Health (NIOSH) N95 standard of air filtration, filtering at least 95% of airborne particles that have a mass median aerodynamic diameter of 0.3 micrometers under 42 CFR 84, effective July 10, 1995.
The type of mask that is effective against airborne transmission is dependent on the size of the particles. While fluid-resistant surgical masks prevent large droplet inhalation, smaller particles which form aerosols require a higher level of protection with filtration masks rated at N95 (US) or FFP3 (EU) required. [43]
On top of that, a face mask might help. In fact, 30% of people in a recent study said their seasonal allergies improved when they wore a surgical face mask outside, and that number improved to 40% ...
Here are the precautions Dr. Leana Wen recommends you take. Coronavirus cases are rising again as Americans plan to celebrate Labor Day and children head back to school. Here are the precautions ...
As omicron spreads, experts say N95, KN95 and other respirator masks do the best job of blocking ... At the same time, the question of which type of mask to wear has grown increasingly complicated ...