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Omicron, the New Covid-19 Variant: What to Know
By Joanna Sugden & Denise Roland
UK takes new measures to slow Omicron coronavirus variant
By Costas Pitas
South African doctor who raised alarm about omicron variant says symptoms are 'unusual but mild'
By Peta Thornycroft & Will Brown
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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