Figure 4.

Global distribution of RBD mutations. (a) Frequency of all RBD amino acid mutations by country. Precise Z-score values and frequencies can be found in Supplementary Figure 1, raw data located in Supplementary Table 1. (b) Frequency of S477N mutations by country as a function of a total 6 974 S477N amino acid mutants. (c) Frequency of N439K mutations by country as a function of a total 629 N439K amino acid mutants.