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Phylogenetic tree based on the sequence alignments of RSV amplicons and representative sequences for RSV subtypes A and B selected from GenBank, as shown in Fig. 4. The scale bar indicates relative genetic distance according to the Jukes-Cantor algorithm. Abbreviations: UCH, amplicons from hematology unit inpatients in 1999 (OB20 to -30); A-1 to A-7, amplicons from control patients A1 to A7.
