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U.S. to Place Travel Restrictions on South Africa, Other Countries
By Sheryl Gay Stolberg & Zolan Kanno-Youngs
There are several COVID-19 variants you haven’t heard of
By Bobby Oler
All coverage
How variants like omicron develop and what makes them variants 'of concern'
By Jon Schuppe & Chantal Da Silva
WHO skips two letters in Greek alphabet in naming Omicron COVID variant
By Mark Lungariello & Jon Levine
What we know and don't know about the Omicron variant
By Christina Maxouris & Ralph Ellis