Knowing which mask to pick and making sure it’s not a fake requires the sleuthing skills of a forensic investigator. Our guide can help. Credit...Charlie Rubin for The New York Times Supported by By ...

A respirator is a device you wear to protect you from inhaling dangerous substances. It’s also used to keep dust and particles from being inhaled when doing things like cleaning and painting. People ...

Editor’s Note (4/19/22): This article is being republished in light of a recent ruling by Florida federal judge Kathryn Kimball Mizelle striking down a federal mask mandate on airplanes and public ...