Non-rebreather masks are used to deliver oxygen therapy to people who require high-concentration oxygen but aren’t in need of breathing assistance. They’re considered low-flow oxygen delivery systems.

In recent months, masks have become a highly polarizing topic. Despite intense debates online, and the sometimes violent conflicts that erupt in public about mask requirements, the science behind mask ...

Doctors and other healthcare workers are taking to Twitter to show that their blood oxygen levels are completely normal while wearing masks. As compulsory mask-wearing laws become more common across ...