Full Coverage
Omicron, the New Covid-19 Variant: What to Know
By Joanna Sugden & Denise Roland
South African doctor who raised alarm about omicron variant says symptoms are 'unusual but mild'
By Peta Thornycroft & Will Brown
South Africa says it is being punished for early COVID variant detection
By Frances Kerry & Promit Mukherjee
The omicron variant spreads across Europe as new travel bans take effect
By Deepa Shivaram & Nicole Hernandez Hammer
The new Omicron variant is a pandemic gut check
By Jacqueline Howard