Figure 2From: Vaccine candidates for dengue virus type 1 (DEN1) generated by replacement of the structural genes of rDEN4 and rDEN4Δ30 with those of DEN1Virus replication in Vero cells. Virus titer in supernatants from infected cells was determined by plaque assay in Vero cells. The lower limit of detection was 0.7 log10 PFU/ml.Back to article page