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Phylogenetic relationships of chikungunya virus isolates from the 2011 Jamshetpur outbreak, India. The maximum likely hood tree was constructed using nucleic acid sequences of the ns1 gene (1160-1700 bp), with O’nyong nyong virus as an out-group virus. *Denotes the strains of present study (Accession Numbers JN974179, JN974180, JN974181, JN974182 and JN974183). The scale represents genetic distance.
