All coverage
Dow tumbles 900 points for worst day of year on fears of new Covid variant, S&P 500 drops 2%
By Eustance Huang & Jesse Pound
Countries ban travellers from southern Africa over Covid variant
By Sarah Neville, Donato Paolo Mancini & Andy Bounds
South Africa Raises Alarm Over New Coronavirus Variant
By Gabriele Steinhauser
Omicron: How worried should we be?
By James Gallagher
Explained: What we know so far about the Omicron variant of Covid-19
By Kaunain Sheriff
South Africa Identifies New Variant of Coronavirus
By Lynsey Chutel, Andrés R. Martínez & Mike Ives
'The virus is always searching for its next move': why science is alert to new variants
By Donato Paolo Mancini, John Burn-Murdoch & Oliver Barnes
EXCLUSIVE South Africa delays COVID vaccine deliveries as inoculations slow
By Promit Mukherjee
South Africa says travel bans over new variant unjustified
By Alexander Winning & Tim Cocks