IL6 and infection: Specifically, we compared the induction of several pro-inflammatory cytokines (TNFα, IL6, IFNγ and MCP1) for changes in expression during infection by analyzing lung homogenates by CBA (Figure 4A, B, C and D) or quantitative RT-PCR to measure levels of mRNAs in Urbani virus or rMA15 virus infected mice, respectively (Figure 4E, F, G and H).