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- ...t in early December 2020, when a phylogenetic tree showing viral sequences from [[Kent]], [[United Kingdom]] looked unusual.<ref>{{cite web |last1=Kupfersc ....uk/news/health-55413666 "Covid: New variant found 'due to hard work of UK scientists"]. BBC. Retrieved 30 January 2021.</ref><ref>{{Cite web|url=https://www.wsj ...219 KB (26,195 words) - 03:05, 28 February 2025