IL6 and infection: Not unexpectedly, IL-6 levels in the media were dependent on infection conditions, with IL-6 concentrations 3.6-fold higher at an MOI of 5 than at an MOI of 1 in RRV-infected cells at 24 h p.i. (p < 0.001; Figure 4(a)) but not in mock-infected cells (Figure 4(a)).