Compared with the control group, the serum IFN‐β levels were significantly lower in the group of patients with asthma [(50.2 ± 15.6 pg/ml, n = 309) vs. (70.2 ± 14.7 pg/ml, n = 163); t = 13.483, p = 0.000]. Here, IFNB1 is linked to asthma.