IL6 and infection: We found that the BAL concentrations of IL-6 (Figure 2H) and interferon inducible T cell alpha chemoattractant (I-TAC) (C-X-C motif chemokine 11 [CXCL11], a key interferon-inducible T cell chemoattractant) (Figure 2I) were significantly higher in the Erdman- relative to the CDC1551-infected macaques at Week 3 after infection.