CCL2 and viral infectious disease: A Fifty-fold lower dose of 17DD YF vaccine is able to trigger equivalent kinetics of IL-8/CXCL-8 and MCP-1/CCL-2 as observed for PRNT seropositivity.Figure 3 shows the results of IL-8/CXCL-8 and MCP-1/CCL-2 kinetics in sera samples from Yellow Fever vaccinees.