On 24 November,a new detected variant B.1.1.529 of SARS-CoV-2 by South Africa was reported to WHO.After only 2 days,this variant was designated as“variant of concern”(VOC)and named as Omicron.In the past few weeks,Omicron had reported from more than 80 countries.It has been reported as the dominant SARS-CoV-2 in U.S.due to the rapid spread of Omicron.A new wave of infection driven by Omicron is in progress.
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