On one level, the world’s response to the coronavirus pandemic over the past two and half years was a major triumph for modern medicine. We developed COVID vaccines faster than we’d developed any ...

PHILADELPHIA — Two years into the COVID-19 pandemic, the public debate on masks is as heated as ever — especially in Philadelphia, which earned national attention for once again requiring masks in ...

The Centers for Disease Control and Prevention issued new guidance that recent studies have indicated that cloth masks offer more protection against the coronavirus than previously thought. Previous ...

The US Centers for Disease Control and Prevention has changed its mask guidelines to recommend that people "wear the most protective mask you can that fits well and that you will wear consistently." ...

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 ...