For months, scientists have been saying masks reduce transmission of COVID-19. They now think masks can also make the illness less severe. The reason is the barrier created by a mask likely limits the ...

Editor’s note: As we will report below, experts agree that face masks with filters — and without — do not replace or relieve the need to wash your hands and practice safe social distancing, and they ...

We're all getting used to wearing face coverings while out and about, and you may have noticed that several masks have a small slot to place a filter for extra protection. Adding a filter in between ...