Researchers have tested a variety of popular hacks for improving the fit of KN95 and surgical masks, and found that while some hacks do improve fit, they can also come at the cost of the wearer's ...

SAN FRANCISCO (KGO) -- The omicron surge has caused the CDC to finally update its mask guidance late last week, indicating a clear preference for the level of protection offered by N95 and KN95 masks.

When the COVID-19 pandemic took off in 2020, so too did questions over the effectiveness of wearing a face mask to prevent the spread of the virus. Now, four years later, what does the science say? In ...

Schools are reopening, amusement parks are welcoming back visitors, and outdoor dining is the new way to eat out. But despite the signs that life is returning back to normal, the coronavirus pandemic ...

FILE - People wearing face masks to protect against coronavirus, travel on a metro in Berlin, Germany, March 31, 2022. A German doctor has been sentenced to two years and nine months in prison for ...