All coverage
Two Omicron coronavirus cases found in Germany
By Madeline Chambers
WHO skips two letters in alphabet in naming Omicron variant
By Jon Levine & Mark Lungariello
Omicron: South Africa blasts travel bans as hospitals see surge of younger COVID patients.
By Daniel Politi
Covid live: UK to bring in new measures after Omicron variant detected; Israel bans oversea visitors – as it happened
By Aamna Mohdin
Dozens of passengers who arrived in Holland from South Africa 'test positive for Covid'
By Joe Davies
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
Dutch: Some of the 61 COVID cases from South Africa flights are new variant
By Bart H Meijer & Toby Sterling