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Maximum likelihood tree showing genetic relationships among CCHFVs based on the M segment (A) and L segment (B). CCHFV strain Cáceres 2014 from Spain is shown in bold. Bootstrap values >90% are shown, based on 1000 replicates. Scale bar indicates nucleotide substitution per site. The CCHFV clades are labeled I–VI and branch labels include GenBank accession number and country.
