http://www.newsweek.com/omicron-dangerous-how-different-covid-variants-who-concern-1653825 > Scientists are assessing the potential threat posed by the Omicron variant of COVID, which has been capturing headlines worldwide over the past few days. > The variant was classified as a variant of concern (VOC) by the World Health Organization (WHO) on Friday after scientists had been voicing concern about it for several days.