These masks will better protect against the Omicron variant of the virus, ... In Pasadena, higher-grade masks protecting… Share this: Click to share on Facebook (Opens in new window) ...

Two medical-grade masks, N99 and N95, are the most effective at filtering viral particles. An N95 mask made by 3M. Reuters/Nicholas Pfosi ...

On April 3, U.S. health officials recommended an arts-and-crafts project to U.S. residents: Make a cloth mask, then wear it when you go out in public.