Omicron, what you need to know..

The Omicron variant, variant B.1.1.529, was first reported to WHO on 24 November 2021 and was classified as a variant of concern by WHO on 26 November 2021. The classification was made on the advice of the Technical Advisory Group on Virus Evolution, based primarily on information from South Africa that the variant has a large number of mutations and has caused a detrimental change in COVID-19 epidemiology.