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Three clades of MERS-CoV based on a rooted phylogenetic tree of 484 complete genomes of MERS-CoV strains from camel and human cases. MERS-CoV isolates are divided into three separate clades: A, B, and C. Clades A and B are prevalent in the Arabian Peninsula and other non-African world countries. Clade C is mainly circulating in African countries. The optimal tree with the sum of branch length = 0.11869958 is shown with scale bar = 0.0005 (5.0E−4).
