The World Health Organization said Nov. 29 that global spread of a new coronavirus variant, named omicron, could result in "severe consequences," as early research indicates it's possible that the ...

(CNN) -- The World Health Organization said on Monday that it has assigned new "labels" to key coronavirus variants so the public can refer to them by letters of the Greek alphabet instead of where ...

The 15th letter of the Greek alphabet had been a fairly innocuous entity for 2,500 years. But in just two weeks, it became notorious. Omicron moved beyond classical philosophy texts, beyond the realm ...