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