Fig. 1

Genomic clustering of 72 DENV–1 samples and 47 reference sequences based on MASH distances. Heatmap illustrates the pairwise similarity between samples, color scale ranges from 0 (blue) to 0.1 (red). Two large groups are identified and colored with the same key. The MASH clustering also reflects the significant difference between references from Asia and from other continents when comparing with the individual samples in this study