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Phylogenetic clustering of DENV-2 isolates from Jeddah in the period between 1992 and 2014 based on E gene sequences. (a) Clustering of one isolate from 1994 highlighted in the pink box. (b) Clustering of isolates from 1994 to 2004 in the gray box and isolates from 1994 in the green box. (c) Clustering of the isolate from 2014 in the blue box
