Figure 2. Phylogenetic tree based on 4,722 nt of the medium (M) RNA segment, including the two Chinese Crimean Congo hemorrhagic fever virus (CCHFV) strains BA66019 and BA8402 and the CCHFV strain IbAr10200, GenBank accession number U39455. Dugbe virus (DUGV) strain ArD44313, GenBank accession number M94133, was used as outgroup. Horizontal distances are proportional to nucleotide difference; vertical distances are for graphic display only. Bootstrap support (in %) is indicated at the respective branch.