The U.S. recorded its first confirmed case of the omicron variant Wednesday — in a vaccinated traveler who returned to California after a trip to South Africa — as scientists around the world race to ...

U.S. Surgeon General Dr. Vivek Murthy warns that while many areas of the country already hit hard by the omicron variant are starting to see cases plateau or improve, many other parts aren't keeping ...

SAN FRANCISCO (KGO) -- Preliminary data out of South Africa is giving the world insight into how strong omicron really is. The South African Medical Research Council just reported this variant may ...

While all eyes are on the new and little-understood omicron variant, the delta form of the coronavirus isn't finished wreaking havoc in the U.S., sending record numbers of patients to the hospital in ...