WASHINGTON -- Many of the world's richest countries have spent the past year hoarding coronavirus vaccines, buying up enough doses to vaccinate their populations several times over and consistently ...

As the seasons shift and we head into the time when respiratory viruses typically become more active, the SARS-CoV-2 virus continues its journey of change and adaptation. This ongoing evolution means ...

SAN FRANCISCO (KGO) -- The U.S is typically four to six weeks behind COVID-19 trends in Europe, which is why the White House is keeping a close eye on the United Kingdom. In the UK, the BA. 2 sub ...

SANTA CLARA COUNTY, Calif. (KGO) -- The World Health Organization is asking scientists and governments to monitor and study the new omicron sub-variant, referred to as BA.2. It's been detected in at ...

NEW YORK (WABC) -- Pfizer and BioNTech say if a variant that evades the vaccine emerges, they would be ready to produce a tailor-made shot against that new variant within about 100 days. The companies ...

Even as the omicron COVID-19 variant continues to sweep the globe, scientists are now monitoring a new mutation of omicron, dubbed BA.2. The World Health Organization maintains that BA.2 is not a ...

The new COVID-19 variant, called Nimbus, has similar symptoms and recovery to the Omicron strain. A health expert says it has not been detected in Pima County yet. TUCSON, Ariz (KGUN). — The new COVID ...