CCL2 and infection: However, comparisons between vaccinated mice showed that H7N7 infection did not significantly increase levels of CCL2 (Figure 2A, p = 0.94), IFNγ (Figure 2B, p = 0.97), IL1β (Figure 2C, p = 0.52), and IL-6 (Figure 2D, p = 0.59) in the lungs compared to vaccinated mice receiving PBS.