Prophylactic effects of baicalein against DENV-2 replication. Foci forming unit reduction assay was used to evaluate the prophylactic activity of the baicalein (A). and the DENV-2 RNA copies were quantified using qRT-PCR (B). All experiments were conducted in triplicates. The percentages of foci reduction (%RF) and RNA copy number reduction were obtained by comparing against the controls maintained in parallel.