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Detection of NS1 protein by ELISA. a Serially diluted recombinant NS1 proteins were applied to ELISA. b Culture supernatants of Vero cells infected with the indicated virus strains were serially diluted and applied to ELISA. c Correlation between ELISA and RDTs. The x-axis indicates color intensities (mAbs: milli absorbance) of TKK-1st kit (blue circles) and TKK-2nd kit (red triangles) and the y-axis indicates optical densities at 450 nm of ELISA from 29 DENV-PCR positive samples
