Three years after the pandemic began, there's still no scientific consensus on how much protection masks offer. Laboratory studies are clear that masks – especially N95s and KN95s – decrease the ...

P95 and N95 are rating classifiers for masks manufactured to keep people from inhaling dust and other small particles in unsafe environments.

As students return to school and employees head back to the office all with new safety protocols likely including wearing a mask, a new study from Duke University explores which masks are more ...