Fig. 4.

The proportion of dominant strains or variants (a variant of concern VOC) out of all samples was sequenced biweekly in 15 countries. The blue curve shows the shows transmission rate (see later method and results). We downloaded aggregated variant proportion data from “The our world in data” which obtained their data originally from GISAID. [[17], [18], [19],22]. (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)