On day 4 post-infection, there were significantly higher levels of the pro-inflammatory cytokine interleukin-6 (IL-6) and chemokine macrophage inflammatory protein-1 alpha (MIP-1α) in the lungs of mice that received TRBV13-2 Tg cells alone than in those that received TRBV13-1 Tg cells or the mix (Fig 2, p<0.01). Here, IL6 is linked to infection.