Table 2 showed no significant differences in gender, age, family history of asthma, and BMI between healthy people and BA children (p > 0.05); however, there were significant differences in the pulmonary function indexes FEV1% predicted and FEV1/FVC%, serum levels of IgE, IL‐17, IL‐6, and TNF‐α, and the number of EOS in blood cells (all p < 0.05). Here, TNF is linked to asthma.