STATEN ISLAND, N.Y. — The newest subvariant of the omicron coronavirus (COVID-19) variant — which spreads more easily than previous variants — has been on the rise for weeks across the United States.

The omicron-specific bivalent COVID-19 boosters could potentially prevent tens of thousands of deaths in the U.S. and save billions of dollars in health care costs if a successful immunization ...

The new omicron subvariants BQ.1 and BQ.1.1 are responsible for 30.9% and 31.9%, respectively, of the cases in the United States. According to the agency, the cases rose quickly since early November.

Months after it sparked a nationwide surge, the omicron subvariant BA.5 continues to remain the most dominant COVID-19 strain in the U.S. Its hold, however, appears to be waning, based on recent data ...

WASHINGTON — The U.S. on Wednesday authorized its first update to COVID-19 vaccines, booster doses that target today’s most common omicron strain. Shots could begin within days. The move by the Food ...

As Omicron has mutated, for example, immunocompromised patients have lost key therapies like the long-acting antibodies in the preventive Evusheld. All of the monoclonal antibodies developed to help ...

With many Chicago-area counties dropping to medium or low COVID alert levels this week, how does that compare to the rest of Illinois? The change comes just as the state and country prepare for the ...

The U.S. on Wednesday authorized updated COVID-19 boosters for children as young as 5, seeking to expand protection ahead of an expected winter wave. Tweaked boosters rolled out for Americans 12 and ...

The World Health Organization said it now has data on the XBB.1.5 omicron subvariant from the U.S., U.K. and the European Centre for Disease Prevention and Control, showing it has a growth advantage ...

The US Centers for Disease Control and Prevention strengthened recommendations for booster doses of coronavirus vaccine Monday, saying all adults should get boosted six months after the second dose of ...

Virologists and epidemiologists say this Omicron sublineage has features that give it the potential to drive a new surge of COVID-19 cases in the U.S., although it's still unclear how large that wave ...