As for IL‐18BP, there should be 1.28% (64% × 2%) monocyte‐derived, 1.19% (1.7% × 70%) neutrophil‐derived and 0.045% (2.8% × 1.6%) B‐cell‐derived IL‐18R+ leucocytes in asthma blood. Here, IL18BP is linked to asthma.