Whereas medical masks are typically tied loosely around the face (hence air can bypass the filter), respirators fit snugly ...

NHS leaders are encouraging people with flu symptoms to mask up in public. Does the science support this advice?

NBC News investigative and consumer correspondent Vicky Nguyen demonstrated on TODAY how effective face masks truly are: She coughed onto petri dishes wearing three different types of face masks ...

Wearing face masks may not have lowered the risk of COVID infection after the first Omicron wave, new research has shown. But that does not mean that face masks aren't useful, regardless. The wearing ...