Since the World Health Organization (who) in January 2020, named the new coronavirus is COVID-19.The COVID-19 variant that is still circulating is the Omicron variant of the novel coronavirus strain reported from southern Africa and named by the World Health Organization in November 2021. In most places, the worst of the Omicron wave has passed.By contrast, some places, such as China, continue to tighten restrictions, insisting on a "dynamic clearance to zero".