All coverage
Two Omicron coronavirus cases found in Germany
By Madeline Chambers
WHO skips two letters in alphabet in naming Omicron variant
By Mark Lungariello & Jon Levine
Omicron: South Africa blasts travel bans as hospitals see surge of younger COVID patients.
By Daniel Politi
Omicron: What we know about new COVID variant
By Maria Cheng & Jamey Keaten
How variants like omicron develop and what makes them variants 'of concern'
By Jon Schuppe & Chantal Da Silva
UK, Germany, Italy confirm cases of Omicron coronavirus variant
By Mersiha Gadzo & Farah Najjar
UK, Germany and Italy detect Omicron variant cases, Israel closes borders
By Costas Pitas, Toby Sterling & Madeline Chambers