IFN-γ, which is found at high levels in non-allergic asthma, has been reported to be either promoted or inhibited by CSBHT according to preclinical studies [14,22,24], while clinical studies have shown inconsistent results, such as decreased serum IFN-γ in patients and no significant change [38,39,41,43]. Here, IFNG is linked to allergic asthma.