Furthermore, compared with matched sedentary healthy controls, ME/CFS patients had higher levels of IL-1β (p < 0.005), IL-4 (p < 0.005), IL-6 (p < 0.005), IL-10 (p < 0.001), and IP-10 (p < 0.05). Here, IL4 is linked to myalgic encephalomeyelitis/chronic fatigue syndrome.