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WHO names transmissible new COVID-19 variant 'Omicron'
By Jamey Keaten
The hunt for coronavirus variants: how the new one was found and what we know so far
By Tulio de Oliveira, Wolfgang Preiser & Jinal Bhiman
Announcement of new virus variant alarms world, as stocks crash and flights are banned
Global rush to ban travellers from southern Africa over new Covid-19 variant
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Stock market news live updates: Wall Street rocked by new COVID variant fears, Dow plunges over 900 points
By Dani Romero
Belgium confirms case of new, heavily mutated Covid variant
By Robert Towey & Spencer Kimball
Explainer: What we know about the new COVID-19 variant detected in South Africa
By Alexander Winning & Alistair Smout
COVID: What we know about the omicron variant
By Alexander Freund
Omicron classified 'variant of concern' by WHO: COVID updates
By Joel Shannon, Michael James & Christine Fernando
WHO labels new Covid strain as 'variant of concern' amid global alarm, names it 'Omicron'
By Saphora Smith
Travel doors slam shut as new Covid variant triggers alarm, stranding hundreds of passengers
By Tamara Hardingham-Gill, Laura Smith-Spark & Ivana Kottasová
WHO names new COVID variant omicron, cautions against travel measures
By Stephanie Nebehay & Alexander Winning