Within 24 h of injury, concentrations of IL-1β, IL-2, IL-4, IL-5, IL-6, IL-7, IL-8, IL-10, IL-12, IFN-γ, and TNF-α were sig. elevated in mTBI.At 1 month, TNF-α, Il-7 and IL-8 levels were sig. elevated in mTBI.At 6 months, TNF-α, IL-7, IL-8 and IL-12 were sig. elevated in mTBI. These comparisons are for ages 21–54. Here, IL4 is linked to concussion.