The significantly increased inflammatory cytokines in children with asthma exacerbation compared as those with stable asthma were granzyme B, IL‐2, IL‐10, IL‐17A, MIP‐1α, MIP‐1β, PD‐L1, and tumour necrosis factor‐α, as shown in Table S3. This evidence concerns the gene IL17A and asthma.