South Korea's KF94 mask does a good job concealing the Mona Lisa's smile — but how effective is it at preventing coronavirus spread? Here, masked pedestrians stroll through a shopping district in ...

1. KF94 masks are high-quality masks made in South Korea that are often described as being more comfortable than typical respirators. Here are five things to know. 2. Lawmakers are calling on the ...

Researchers developed and validated a prototype of a mask-based device designed to continuously monitor exhaled breath condensate (EBC) in pilot studies. The EBCare mask looks similar to a KF94 mask ...