Time of addition studies with seaweed extracts A1, A3, A8 and A12.

<p>(<b>A</b>) Huh 7.5 cells were infected with DENV-4 with an MOI of 0.1 following each treatment (before the infection, −1.5 h; during the infection, 0 h; and after the infection, +1.5 h) at the MNTD, the cells were submitted to the ELISA assay (<b>B</b>) and the supernatant for the foci-forming assay. The dashed line represents the detection limit of the foci-forming assay.</p>