All coverage
U.S. President Biden calls for intellectual property protection waivers after Omicron discovery
By Heather Timmons, Nandita Bose & Lucia Mutikani
Covid news: WHO says omicron strain is variant of concern
By Robert Towey & Sam Meredith
What's known and unknown about Omicron, the coronavirus variant identified in South Africa
By Andrew Joseph
What to know about the omicron variant and subvariant BA.2
By Lindsey Bever, Joel Achenbach & Meryl Kornfield
What to know about omicron, the new COVID variant
By Michaeleen Doucleff
U.S. imposes travel ban from eight African countries over Omicron variant
By Nandita Bose & David Shepardson