All coverage
Omicron variant: COVID travel restrictions increasing
By Dawn Gilbertson
Omicron: South Africa blasts travel bans as hospitals see surge of younger COVID patients.
By Daniel Politi
Dozens of passengers who arrived in Holland from South Africa 'test positive for Covid'
By Joe Davies
WHO skips two letters in alphabet in naming Omicron variant
By Mark Lungariello & Jon Levine
Coronavirus: Covid News: Omicron Variant Puts Nations on Alert (Published 2021)
By Isabella Grullón Paz, Nick Cumming-bruce & Jason Horowitz
What we know and don't know about the Omicron variant
By Christina Maxouris & Ralph Ellis
How variants like omicron develop and what makes them variants 'of concern'
By Jon Schuppe & Chantal Da Silva