Recent study investigated the effects of CCR7 knockdown and overexpression on dendritic cell‐mediated immune tolerance in the lungs of rats with allergic asthma and found that CCR7 expression levels affected the expression of various cytokines such as IL‐12, IL‐4, IFN‐γ and IgE, as well as the amount of immune cells in the lungs [93 ]. Here, CCR7 is linked to allergic asthma.