LAS VEGAS, NEVADA -- A California couple says they were fully vaccinated, but still contracted COVID-19 while on vacation as experts say breakthrough cases are possible, especially with the delta ...

The delta variant is fueling the COVID-19 surge in the United States, but experts warn that a more dangerous variant could emerge if more Americans don't get vaccinated. Delta is the most recent of ...

Differing strains of the coronavirus continue to appear around the world and a new COVID-19 variant, the so-called "Delta" variant, has health experts concerned. The variant, otherwise known as B.1617 ...

As summer comes to an end, COVID-19 cases are on the rise again in California. While respiratory viruses usually peak in the winter, the novel coronavirus can also surge in the warmer months.

SAN FRANCISCO -- California health officials are now recommending that residents wear face masks in public indoor settings, regardless of vaccination status, as the COVID-19 Delta variant continues to ...

Moderna on Tuesday released preliminary data indicating its vaccine is likely to hold up against several variants of concern, including the Delta variant, which is predicted to become the dominant ...

NEW YORK (WABC) -- New York City's latest COVID positivity rate is still low at 1.17 percent. Marriage bureaus in the city are opening on Monday for in-person weddings. However, there was a warning on ...

COVID-19 is once again climbing to troubling levels in California — a worrying trend as health officials attempt to navigate a vaccine landscape thrown into uncertainty by delays and decisions from ...

SAN FRANCISCO (KGO) -- A surge in coronavirus cases has been reported in the Bay Area and across California as well as the country due in part to the emergence of the highly-contagious delta variant.

Add Yahoo as a preferred source to see more of our stories on Google. Sept. 2024 photo of Breiona Lang LVN receiving a COVID-19 vaccine from nurse Breiona Lang. left, at a Kaiser Permanente clinic in ...