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Classification of Omicron (B.1.1.529): SARS-CoV-2 Variant of Concern
Biden restricts travel from South Africa and seven other countries starting Monday
By Kaitlan Collins
BioNTech says it could tweak Covid vaccine in 100 days if needed
By Julia Kollewe & Hannah Devlin
What's known and unknown about Omicron, the coronavirus variant identified in South Africa
By Andrew Joseph
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World Health Organization calls new COVID strain a "variant of concern"
By Allison Elyse Gualtieri
U.S. President Biden calls for intellectual property protection waivers after Omicron discovery
By Nandita Bose, Heather Timmons & Lucia Mutikani
What to know about the omicron variant and subvariant BA.2
By Lindsey Bever, Joel Achenbach & Meryl Kornfield
WHO labels new Covid strain, named omicron, a 'variant of concern,' citing possible increased reinfection risk
By Robert Towey & Sam Meredith
Biden admin announces travel ban for South Africa and 7 other countries, citing new variant
By Myah Ward
What to know about omicron, the new COVID variant
By Michaeleen Doucleff, Joel Rose & Nicole Hernandez Hammer
Omicron: What we know about Covid strain prompting fresh global restrictions
By Clive Cookson & Oliver Barnes
U.S. imposes travel ban from eight African countries over Omicron variant
By Nandita Bose & David Shepardson
U.S. to restrict travel from South Africa, 7 other countries as new Covid variant emerges
By Leslie Josephs & Christina Wilkie