DOJ will appeal federal judge's ruling dropping COVID masks, new surrender deadline in Mariupol as West promises Ukraine more arms, and NASA beamed a doctor to The ISS in a world-first 'holoportation' achievement.

U.S. to increase vaccine exports amid global pressure, states move to lift mask requirements, and new study reveals one major side effect of exercising more.

CDC eases face mask guidelines for fully vaccinated people outdoors, what's next for President Biden after the first 100 days, and this high school has nine valedictorians.

Census adds power to GOP strongholds, CDC to update outdoor mask guidelines for vaccinated Americans, and summer vacation destinations.

U.S. sets single-day records for pandemic cases, President-Elect Joe Biden to suggest 100 days of masks after inauguration, and youth vaping rates have plunged during lockdown.

Seven months into the pandemic, there are still many unanswered questions. Jorge Ortiz from USA Today answers some key ones, like whether six feet of distance is enough and how to safely organize holiday gatherings.