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Can a mask really keep you from catching the virus? To answer that, it helps to clarify which kinds of masks we're talking about.

China makes millions of masks. But ramping up production is tricky. "Making masks is not as easy as you imagine," a pharmaceutical executive in China says.

The executive order signed by President Biden Thursday also includes interstate travel on trains, buses and cruise ships, in a sharp reversal of the Trump administration's lax mask culture.

Pennsylvania, Oregon and Kansas are among the latest states to require face coverings in public settings as COVID-19 cases surge in much of the country. Health officials say masks can slow the spread.

The shortage of masks and other protective gear has left medical staff pleading for help. Several pop-up volunteer groups are matching individual donors with local hospitals most in need.

These character-driven novels featuring fracturing families, intrepid scientists and one very plucky early American heroine will spark lively debate on everything from the unreliability of memory to scientific ethics.

A World Health Organization representative just advised wearing masks after vaccination. The CDC has a different perspective. We asked public health specialists to weigh in.

It's a sign the three Northeastern states are changing how they manage the COVID-19 pandemic as cases from the omicron surge continue to drop.

California has dropped its statewide mask mandate but a few counties are keeping restrictions, complicating things for those whose lives straddle places that require masks and those that don't.

Florida's governor has threatened to withhold funding from school districts that adopt a mask requirement. With COVID-19 spreading unchecked, some districts are considering requiring masks anyway.