The Delta variant has become the dominant strain of COVID, now accounting for more than 93% of all cases in the U.S., mostly among the unvaccinated population. The Centers for Disease Control and ...

Not all face masks are created equal when it comes to curbing the spread of the coronavirus, the U.S. Centers for Disease Control and Prevention says. In an updated guide on face masks, the agency ...

MASKS with valves and clear plastic shields do not stop the spread of coronavirus, it has been claimed. Cloth and surgical masks that are plain in design are more effective at reducing the risk of ...

People wearing plastic face shields or masks fitted with a valve can spray invisible droplets over a very wide area when they sneeze or cough, making the devices ineffective at preventing the spread ...

Face masks have now become essential travel accessories. Even during those few months when Centers for Disease Control and Prevention (CDC) guidance on indoor face mask use loosened, they were always ...