LONDON — As more cases of the new omicron Covid variant emerge around the world, experts say it's likely that the variant, first identified in South Africa last week, had already been circulating for ...

During surges, the differences in case rates between in-center and home patients were more apparent than during non-surge weeks for all variant-dominated periods.

SAN FRANCISCO -- 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 cause ...

WASHINGTON -- As the "extraordinarily contagious" omicron variant surges across the United States, Dr. Anthony Fauci warned that COVID-19 cases will likely continue to climb. "Every day it goes up and ...

WASHINGTON -- President Joe Biden plans to announce on Tuesday that his administration will distribute 500 million free at-home rapid tests to Americans beginning in January to combat the surging ...

The race is on for new treatments that stand up to omicron's explosive spread. With omicron's explosive spread threatening to outpace current COVID-19 treatments, the race is on to find new options ...

The immune system’s first encounter with a virus or vaccine establishes a “starting template” that shapes its response to new ...

NEW YORK (WABC) -- New York City health officials issued a new mask advisory on Monday, strongly recommending all residents -- regardless of vaccination status -- wear masks in all public indoor ...

NEW YORK -- What are the symptoms of omicron? Health experts still don't know if the new variant is causing milder COVID-19, but more indicators are emerging. The World Health Organization's top ...

CoV-2 variants now spread less efficiently in animals, lowering concerns that animal reservoirs could generate new variants ...

The question hung in the air like a bad odor, silencing the small group of fully vaccinated and boosted friends and family at my dinner table. "Why not just get omicron and get it over with? It's mild ...