However, at 24 h post infection, RANTES (Figure 6B, left panel) and IP-10 (Figure 6C, right panel) mRNA expression levels were comparable in VN04/H5N1 and HK98/H1N1 viruses infected while IFN-β mRNA expression level was significantly lower (p = 0.03) in VN04/H5N1 infected cells than in HK98/H1N1 infected cells (Figure 6A, right panel). Here, IFNB1 is linked to infection.