Fig. 1

Dendrogram representing the phylogeny of viruses with SARS-CoV-2. Phylogenetic tree is divided into three clades, and all clades are further divided into sub-groups. 2019-SARS-CoV-2 from clade III is closely related to its relatives from Hong Kong and USA (circled in blue). For accessions, origin and other relevant data, see Additional file 1