We obtained comparable viral titres in IFN-β treated and untreated cells in the early time points but the titres were decreased by two-fold in the IFN-β stimulated cells compared to the un-stimulated cells in the later time point of infection (48 hpi), as shown in Figure 1, and are suggestive that YFV evaded interferon activity during the early phase of infection. The gene discussed is IFNB1; the disease is infection.