As the delta variant continues to spread in countries around the world, some COVID-19 safety restrictions have been reinstated in efforts to curb the rising cases. But the director of the U.S. Centers ...

CHICAGO (NewsNation Now) — Some state and local leaders are encouraging even fully vaccinated people to wear masks indoors to blunt a rise of the delta variant of COVID-19. Monday, Illinois Gov. JB ...

Here’s what the Centers for Disease Control and Prevention (CDC) says about the Delta variant, its symptoms, characteristics and other things to watch for: Viruses constantly change through mutation, ...

Area health officials are encouraging residents to follow new federal health guidelines that advise Americans — even those who are fully vaccinated — to wear masks in certain situations in areas with ...

The World Health Organization urged vaccinated people around the world to continue to "be appropriately cautious" when it comes to the transmission of COVID-19, especially the rising delta variant.

Delta deadliest among COVID-19 variants, say CCMB scientists. Five different SARS-CoV-2 variants were chosen and scientists ...

WASHINGTON -- President Joe Biden said Tuesday afternoon that a mandate to require all federal employees to be vaccinated is now "under consideration." Sources familiar with the discussion told ABC ...

SAN FRANCISCO -- With the Delta variant and breakthrough cases of COVID-19 reported, some vaccinated people are wondering when, if at all, they should get tested. Health officials say there are at ...

Oregon will soon require people to wear masks outdoors in public settings where physical distancing isn't possible, the governor said Tuesday, in response to near-state-record COVID-19 cases and ...