SAN FRANCISCO (KGO) -- Bay Area doctors and health officials are concerned about the rapid spread of the COVID-19 Delta variant, warning significant outbreaks could trigger a setback for the state.

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 ...

HOUSTON, Texas (KTRK) -- Texas Medical Center healthcare leaders are now calling the increase in COVID-19 cases a fourth wave. On Tuesday, the TMC's president and CEO said that hospitalizations went ...

CHICAGO (WLS) -- Work being done inside a UIC lab will hopefully lead to more information about various strains of COVID-19, including the Delta variant. "What we want to know is how fast these ...

The Centers for Disease Control and Prevention listed the COVID-19 delta variant as one of its "variants of concern" (VOCs) on June 15. According to the CDC, VOCs can be more contagious, more ...

The more contagious Delta variant of Covid-19 now makes up 83% of sequenced samples in the United States, US Centers for Disease Control and Prevention Director Dr. Rochelle Walensky said Tuesday.

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 ...

NEW YORK CITY (WABC) -- New York City Mayor Bill de Blasio said Friday that there are no plans to return to mandatory mask wearing like what was recently re-enacted in Los Angeles County, as the ...

TRENTON, New Jersey (WPVI) -- Gov. Phil Murphy and New Jersey health officials are urging people to get vaccinated as new COVID-19 cases and hospitalizations rise. On Monday, state officials said 99% ...

Here's what infectious disease experts say about taking that summer vacation. On Monday, airlines reinstated a slew of flights between the U.S. and the U.K., as the U.K. announced its plans to reopen ...

Estimates show the variant accounts for over 51% of all new cases nationwide. A highly contagious variant of the novel coronavirus that was initially identified in India is now the dominant strain in ...