Fig. 1From: COVID-19 annual update: a narrative reviewTemporal appearance of the SARS-CoV-2 strains. (Left) Each dot represents a sequenced genome at a given time point. Connecting lines indicate the evolutionary relationship among strains. The labels indicate the emerging lineages (nomenclature from nexstrain.org). (Right) Frequencies of sequenced genomes across continents (modified from nextstrain.org)Back to article page