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Comparison of the viral load between mono- and co-infections with different DENV serotypes (38 patients' samples were subjected to the quantitative RT-PCR using the capsid gene primers) [20]. DENV is given as D in the figure and that D1 = DENV-1, D2 = DENV-2, D3 = DENV-3 and D4 = DENV-4.
